The fight is already loud—ashes on the floor, Osty limping, two enemies still standing. You have one turn to decide whether to gamble on a setup or bleed out trying to rebuild. I’ve played enough runs to know which choices make the difference between a frantic retreat and a clean sweep.
I write from the trenches: I test runs on Steam, check patch notes from MegaCrit, and read community threads on Reddit for patterns. You and I will strip Necrobinder’s noise into a simple plan that favours patience, timing, and a hulking little minion who does the heavy lifting.
On a bus full of strangers, someone always leans on you for a favor. How to use Necrobinder in Slay the Spire 2
You don’t play Necrobinder the same way you play a lone bruiser. She’s a spellcaster whose value comes from a companion: Osty. Osty soaks hits, delivers damage, and must be built as a secondary character inside your deck. If you let him live, he wins you fights.
Mechanically, she’s fragile—lowest HP of the roster—so you must protect and amplify Osty instead of throwing Necrobinder into the meat grinder. Osty is like a battering ram: small on its own, unstoppable once you’ve reinforced it. That means card synergy matters more than raw damage numbers. You play slow, thin your deck, then strike when the companion is primed.
At a kitchen table, old players trade quick tips over coffee. Best Necrobinder deck in Slay the Spire 2
There are two practical roads. One leans on Doom, the other on pure Osty growth—most consistent wins come from the latter. The core plan is simple: build Osty’s HP and hits while thinning Necrobinder’s deck until every draw contributes to the setup.
Patience wins here. You want Osty to be the front line and the finisher. When he’s bulky, he absorbs hits and every boosted attack snowballs.
Early commons and uncommons
| Card | Why pick it |
|---|---|
| Protector | For 1 Energy, Osty deals 10 damage. Any HP growth you give him converts directly into damage, so Protector scales with your plan. |
| Snap | One Energy for 7 damage and a retained card next turn—helps you stall a setup turn while keeping pressure. |
| High Five | Two Energy to hit all foes for 11 and apply Vulnerable—great for clearing early waves and forcing enemy turn economy changes. |
| Rattle | Osty deals 7 damage and gains extra hits based on attack count—synergizes with cards that make him swing multiple times. |
Best cards
| Card | Why it matters |
|---|---|
| Fetch | Zero Energy: Osty hits for 3 and you draw. Cheap triggers let you chain free effects and bait Flatten activations. |
| Flatten | When Osty hits once that turn, Flatten punches for 12 damage at zero cost—massive tempo swing when setup is ready. |
| Reanimate | Three Energy to give Osty +20 HP. That’s an investment that pays back in both tanking and damage scaling. |
| Sic ‘Em | One Energy for 5 damage while granting Osty +2 HP per attack that turn—very efficient growth in longer fights. |
| Spur | One Energy to grow Osty by 3 and heal him for 5—keeps the minion healthy between big exchanges. |
What are the best cards for Necrobinder?
The list above is the short answer. If you’re hunting one-card synergies, prioritize free triggers (Fetch), single-hit amplifiers (Flatten), and HP-growth spells (Reanimate, Spur). Those cards create the compounding loop that turns Osty into your win condition.
How should I build Osty to survive boss fights?
Grow HP first, damage second. If Osty survives the first four turns of a boss, he will usually outvalue any damage output the boss can muster. Pick relics that grant block or passive healing to Necrobinder so you can buy those early growth turns.
Setting up these combos is like threading a fuse: slow, deliberate, and worth the wait when it blows the enemy away.
You overhear a streamer trade relic advice between runs. Best relics for Necrobinder in Slay the Spire 2
Necrobinder doesn’t demand a single relic to shine, but Bone Flute deserves a special mention. It grants 2 Block whenever Osty deals damage—extra shield that buys you setup turns.
Other strong relics: any that increase max HP, give per-turn block, or provide card draw to cycle into your setup faster. I track runs on Steam and compare notes with Moyens I/O screenshots when a new patch lands; currently the game lists on Steam for $19.99 (€18) look fair for repeated runs.
Which relics should I prioritize for Necrobinder?
Prioritize Bone Flute, relics that grant flat HP, and passive block sources. If you grab a relic that accelerates card draws or zero-cost triggers (Fetch synergies), your ability to stitch sets goes up exponentially.
I’ve seen players on Reddit recommend different combos, but the constant is the same: keep Osty healthy, thin the deck, and value turns where he hits. The community on Steam and creators at MegaCrit discuss balance regularly—watch patch notes for any card tuning that changes these thresholds.
If you want a single practical takeaway: shelter the minion, prune the deck, then let the little body do the heavy work. Ready to make Osty the executioner and force a debate on the best late-game relics?