Astrea Six-Sided Oracles: Beginner's Guide & Best Tips

I Almost Quit Astrea Three Times. Here's Why I'm Glad I Didn't.

I'm not gonna lie to you — my first dozen runs in Astrea Six-Sided Oracles were a disaster. I thought I was hot shit because I'd beaten Slay the Spire on ascension 20 and had a few hundred hours in Monster Train. Then Astrea came along and humbled me so fast I got whiplash. I spent my first three runs trying to stack poison like it was a bleeding build in Monster Train, and the second boss destroyed me EVERY. SINGLE. TIME. Not because I was unlucky. Because I was playing the game wrong.

Here's the thing nobody tells you: Astrea looks like a deckbuilder but it's actually a puzzle game wearing a deckbuilder's skin. The dice aren't just random — they're tools with very specific jobs. And until you understand that, you're going to keep losing to the same fights, wondering why your Corrupted Sinner build falls apart against the third boss. I've been there. I raged. I alt-F4'd more times than I care to admit. But once the mechanics clicked? This became my favorite game in the genre. I'm writing this because I want that to happen for you without the three-hour YouTube research hole I had to crawl through.

Why Players Struggle (And Why It's Probably Not Your Fault)

Let's call a spade a spade: Astrea's tutorial is... fine. It teaches you how to roll dice and how to read your dudes' health bars. It does NOT teach you how to actually win. Here are the three things that tripped me up hardest:

• The dice are not your weapons — your re-rolls are. This took me way too long to understand. Every die in your pool has a set of faces. Some are good, some are mediocre, some will literally kill your own guys. The skill isn't in rolling a good result — it's in knowing when to lock a face and when to burn a re-roll to fish for something specific. I wasted countless runs hoarding re-rolls for "emergencies" that never came, while dying because I refused to spend one to turn a 2-damage face into a 4-damage face on my best attacker.
• The corruption mechanic will murder you if you don't respect it. Every time you take damage, you get corruption pips. Those pips can be used to empower your own dice, but they also make your characters hit harder in weird, often self-destructive ways. New players either hoard all corruption because they're scared of it (and lose because their damage output is pathetic) or they dump every pip into one guy and that guy kills themselves on their own turn. There's a sweet spot. You have to find it.
• The scaling is not linear. The first boss is a damage check. The second boss is a sustain check. The third boss is a "can you manage your dice pool without panic-rolling" check. Each boss requires a different build philosophy. Going into the third boss with a poison/bleed stacking build that takes five turns to come online? You're dead. I learned this the hard way. Twice.

If you're reading this because you just lost a run where you "did everything right" and still got smoked, take a breath. It's not you. The game hides its real complexity behind a pretty dice-rolling animation. You're supposed to feel lost at first.

First Steps: What You Actually Need to Know Before Hour One

Forget everything you know about HP and damage in other deckbuilders. Astrea works differently. Here's the raw, unvarnished truth:

• Health is a resource, not a score. You are going to take damage. Accept it. The best players intentionally take small hits early in a fight to generate corruption pips, then use those pips to fuel their big damage turns. I'm not saying throw your characters at the enemy like a meat grinder. I'm saying that trying to keep everyone at 100% HP will starve you of corruption, and a corruption-starved build is a dead build. I played my first ten runs trying desperately to stay full health. I lost every single one.
• Lock dice aggressively. There's a button to lock a die so it doesn't get re-rolled. Use it. If you roll a 5-damage face on your damage dealer, lock that die immediately. Don't get greedy trying to roll a 7. I've seen so many new players (myself included) lose their best die because they tried to optimize a perfectly good roll. A 5 in hand is worth a 7 on the table. Remember that.
• Focus on one or two characters per fight. The game gives you a party of six most of the time. You do not need to use all of them every turn. Pick your two strongest hitters and one support, and let the other three sit back and generate corruption for you. Trying to activate all six every round spreads your resources too thin and makes you waste re-rolls on mediocre faces. I watched my buddy do this for three hours straight before I told him to just bench half his team. He won his next run.
• Upgrade your core dice first. You'll get opportunities to upgrade dice between battles. Upgrade the dice you use every single turn — your basic attack die and your primary defense die. Don't waste materials on some flashy once-per-battle super die that you might never roll. I upgraded a "roll all enemies bleed" die once and then never saw it again for three fights. Felt like an idiot.

Expert Tips: The Stuff That Separates a Win From a Controller Through the Wall

Alright, you've got the basics. Now let's get into the real meat. These are the techniques I use on my daily runs that make the game feel almost unfair — but only because the game doesn't tell you they exist.

• Reroll sabotage: force the enemy to waste their turn. Some enemies have dice that do massive damage but require a specific face to activate. If you see an enemy lock a die in their "prep" phase, you can sometimes predict what they're going for. Use your re-rolls to flood the pool with garbage faces. It doesn't always work, but when it does, you've essentially skipped the enemy's turn. I do this against the second boss every time. She has a 12-damage face on her main die. If I see her lock a single die early, I dump my re-rolls into making sure every other die she gets is a blank. She spends the turn doing nothing. It's beautiful.
• Stack the same corruption type across your party. There are three corruption types: red (offensive), blue (defensive), and green (healing/support). A common mistake is trying to balance all three. Bad idea. Pick one corruption type that your best character benefits from and feed all your corruption pips into that character. I always go for a red corruption build on my main damage dealer. The damage multiplier gets insane around turn 4 or 5. Meanwhile, my support character gets blue corruption for shields. Trying to do all three means nobody gets enough to matter.
• The first room determines your build. This is huge and the game never tells you. Look at the dice you get from the first battle. If you see a lot of poison dice, lean into poison. If you see raw damage dice, go raw damage. Don't go into a run with a predetermined build in your head. I used to force "healing build" every single run and lose by the second boss because I was ignoring the dice the game was literally handing me. Let the RNG guide you, not the other way around. This is similar to how builds emerge in Hades — you have to adapt to what the game gives you, not force a pre-planned strategy.
• Use the "delay" option more than you think. If you have a die that's not great but also not terrible, and you have no good plays, you can click the delay button to pass your turn and keep your dice. This is NOT a wasted turn. This is a tactical reset. You bank your current dice, let the enemy take their turn, and then you come back with a fresh pool. I used to never delay because I felt like I was "wasting time." Now I delay at least once per fight on purpose. It's especially good for the bug enemy that spams poison. Let him poison you, then on your next turn, you get two full rounds of dice to clean it up.
• Vendor priorities: dice > relics > blessings. The vendor shows up between fights. You'll get three options: a new die, a relic (passive effect), or a blessing (one-time use). 90% of the time, take the die. Relics are nice but a bad die will lose you the run. Blessings are traps — they're one-time use and you'll hoard them until the final boss, then forget to use them. I've done this at least twenty times. Get the die. More dice means more options means more control.

Oh, and one more thing: learn the enemy patterns. Each enemy has a "tell" — a specific die they lock first in their rotation. The fire imp always locks its burn die first. The water elemental locks its freeze die. If you see the fire imp start its turn with a locked die, you know burn is coming. Shield up or cleanse that turn. I started tracking these patterns on a sticky note next to my monitor. Yeah, I'm that guy. But I stopped losing to random encounters, so it was worth it.

Common Mistakes That Got Me Killed (So You Don't Have to Make Them)

I made these mistakes so many times that I could write a book. Save yourself the pain:

• Hoarding corruption until you're at 10% health. This is the #1 newbie trap. Corruption is power. If you sit on 20 pips and never use them because you're "saving for the boss," you're deliberately gimping yourself for the entire run. Spend corruption aggressively in the first two acts. The bosses are tuned for you to have used it. I once saved 40 corruption pips for the final boss, and then died because my characters couldn't deal enough damage to clear the adds that spawned on turn two. 40 pips. Wasted. I think about that run sometimes.
• Not reading the dice faces before a fight. This sounds dumb, but I did it. I'd start a fight, look at my dice, and go "okay, let's roll." Then I'd realize too late that one of my dice had a "deal 2 damage to yourself" face that I forgot about. Every die has a tooltip when you hover over it. Read every face of every die before your first roll of the fight. I started doing this and instantly stopped losing to self-damage that I could have avoided.
• Using all your re-rolls on the first turn. Your re-rolls refresh after each fight, but they are limited per turn. A lot of new players (me included) panic-roll on turn one to try to get a perfect opening hand, then have no re-rolls left for turns 2-4 when things get hairy. Re-rolls are for correcting mistakes, not for chasing perfection. Learn the difference. If your opening hand is "fine," play it. Save your re-rolls for when the enemy drops a 15-damage die that you absolutely have to block.
• Ignoring the corruption cleanse button. In the character menu, there's a button that lets you spend gold to remove corruption from a character. This is the most underused mechanic in the game. If your main damage dealer has 12 corruption and is about to kill themselves on their own attack, spend the gold. I've seen people die with 500 gold in the bank, refusing to spend 50 gold to save their carry. Gold is worthless if you're dead. Spend it.
• Bringing a team with no synergy. Your characters have passive abilities that trigger when you roll specific dice. Some characters get +2 damage when you roll a 6. Some heal when you roll doubles. Before a run, look at your starting team's passives and build your dice pool around them. I spent five runs with a team that had "heal on even rolls" passives and I kept picking odd-numbered dice. It was like trying to swim with my shoes on. I don't know why I did that. Don't be me.

FAQ — The Questions You're Too Ashamed to Ask the Discord Server

Q: I keep dying to the first boss. What am I doing wrong?
A: You're probably not generating enough corruption early in the fight. The first boss scales based on how many turns you take. If you spend 4 turns poking him for 2 damage each, you lose. You need to take some early hits from his minions to build corruption, then use that corruption to fuel a big damage turn around turn 3 or 4. If your corruption meter is empty by turn 3, you've already lost.

Q: Is there a "best" character to start with?
A: The starting character with the shield die is the most forgiving for beginners. Her base defense die has a face that blocks 4 damage — that's huge in early fights. The fire mage starter hits harder but has zero survivability. I started with the shield character and it took me from dying on floor 2 to reaching floor 4 consistently. Swap to the fire mage once you understand corruption management.

Q: Is the RNG just bad? I feel like I never get the dice I need.
A: The RNG is seeded, not pure random. The game tracks what dice you've seen recently and adjusts the pool to prevent dry spells. If you're going 5 fights without seeing a single damage die, it's because you're not honoring your build — you're rejecting the dice the game offers and waiting for something that fits a mental image of your "perfect deck." Accept what the game gives you. If it keeps feeding you poison dice, don't fight it. Go poison.

Q: How many re-rolls do I get per turn?
A: It depends on your characters and relics. Base is 3 re-rolls per turn. Some characters give you an extra. Some relics give you more. But 3 is the standard, and that's usually enough if you're not wasting them. If you find yourself needing more than 3 re-rolls to have a functional turn, your build is the problem.

Q: Can I pause mid-fight to read dice?
A: Yes. Press Escape or the Start button. The game stops. You can read every die face, every enemy's tooltip, and plan your entire turn. I do this all the time. The game doesn't punish you for it. Use it. There's no "quick thinking" medal for playing without pausing.

Q: Is this game harder than Slay the Spire or Slay the Spire?
A: Yes and no. Slay the Spire is harder to learn but easier to master once you understand card synergies. Astrea is easier to understand on the surface (dice are intuitive) but harder to master because the dice pool is smaller and your re-roll management matters more. I'd say Astrea has a steeper initial difficulty spike, but once you're over it, the skill ceiling is lower. For raw complexity, Monster Train still wins. But Astrea is more punishing of mistakes.