Slay the Spire 2 Necrobinder Guide: Keeping Your Skeletal Pet Alive
Playing a frail lich with only 66 starting health is a terrifying experience until you learn how to weaponize the void.
Mega Crit clearly designed the Necrobinder for players who love staring at a calculator while their enemies slowly realize they are already dead. This character operates on a completely different wavelength than the rest of the roster. You are not just managing your own pathetic health pool. You are managing a dual unit setup featuring a massive reanimated hand named Osty.
I recently put together a Slay the Spire 2 character tier list where I placed the Necrobinder firmly in the A tier. She absolutely has the mathematical potential to break the game and secure that top spot, but her current defensive reliance on Osty feels slightly bugged. Sometimes damage leaks through when the giant hand is supposed to absorb it, and eating an unexpected 15 damage attack when you only have 66 total HP is a fast track back to the main menu.
Despite the early access quirks, her card pool is incredibly deep. If you want to stop dying in Act 2, you need to understand exactly how her three primary archetypes function.
Mastering the Doom Execution Engine
The Doom mechanic is arguably the most satisfying way to kill an elite boss in the entire game. Do not confuse this with the Silent's poison mechanic. Poison grinds health down turn by turn. Doom is a strict execution threshold. When an enemy accumulates Doom stacks equal to or below their current health, they are instantly swallowed by the void at the end of their turn.
You are essentially applying a death mark and watching the math solve itself. This playstyle is slow, methodical, and requires a lot of defensive posturing while the pressure gauge fills up.
Essential Doom Cards
If you are committing to the executioner route, you need to find Scourge and Doom Spike early. These are your primary applicators. Scourge applies a flat 13 Doom and draws a card, keeping your hand moving. Doom Spike deals direct damage while stacking the debuff, effectively lowering the enemy's health while raising the execution threshold simultaneously.
The absolute crown jewel of this deck is No Escape. It applies 10 Doom and then adds an additional 5 Doom for every 10 stacks already sitting on the target. It is an exponential nightmare for high health bosses. Pair this with defensive options like Death's Door, which grants massive block multipliers if you applied Doom that turn, and you can comfortably turtle behind your shields while the enemy seals their own fate.
The Infinite Soul Machine
If slow execution sounds boring, you can turn the Necrobinder into a rapid fire machine gun. This entire archetype revolves around the unique "Soul" card. Souls cost zero energy and draw two cards. By themselves, they are just a fantastic cycle engine. With the right setup, they become a primary win condition.
Essential Soul Cards
To make this work, you need generators. Reave is a cheap attack that shoves a Soul into your draw pile, while Capture Spirit directly damages the enemy and adds three Souls to your deck.
Once you have a reliable way to generate Souls, you play Haunt. This power card forces a random enemy to lose 6 HP every single time you play a Soul. The beauty of Haunt is that the HP loss completely ignores enemy block. If you manage to draft two copies of Haunt and a small, tightly curated deck, you can achieve a pseudo infinite loop. You just chain zero cost Souls, drawing more Souls, while the enemy melts from unavoidable passive damage.
This engine is exactly why I strongly advise against picking up too many Slay the Spire 2 Quest Cards when playing the Necrobinder. You cannot afford to have unplayable dead draws clogging up your hand when your entire survival strategy relies on cycling your deck as fast as humanly possible.
The Osty Beatdown Strategy
Sometimes you just want to let your pet do the heavy lifting. Osty starts every combat with 1 HP and absorbs incoming hits for you. If he dies, he reassembles on your next turn. However, you can use the new "Summon" keyword to buff his health pool and turn him into an impenetrable wall that also hits like a freight train.
Essential Osty Cards
The synergy between Squeeze and Flatten is currently one of the highest burst damage combos in her arsenal. Squeeze is an expensive three energy attack where Osty deals 25 base damage, but it gains 5 extra damage for every single Osty attack card in your deck. It rewards you for committing heavily to the pet archetype.
You follow that massive hit up with Flatten. This normally costs two energy for 12 damage, but its cost is reduced to absolutely zero if Osty has already attacked that turn. You command your giant skeletal hand to crush the enemy, and then you get a free follow up strike immediately after.
To keep this aggressive momentum going, you need cards like Symbiosis and Bodyguard to constantly inflate Osty's health pool. If Osty shatters, you lose your primary damage source and your only real physical shield.
The Act 1 Miracle Find
I cannot wrap up a Necrobinder guide without mentioning Scythe. This is a rare attack card that deals 13 damage for two energy. That sounds terrible on paper, but every single time you use Scythe, its damage permanently increases for the rest of the run.
It has the Exhaust keyword, meaning you can only swing it once per combat unless you find a way to pull it out of the discard pile. If you manage to find Scythe on the first few floors of Act 1, you can build your entire run around it. Treat it like a pet. Feed it every single fight. By the time you reach the Act 3 boss, you will be holding a single card capable of dealing over 100 damage in one swing.
