Sacrifice

NecrobinderSkillRare
Retain.
If Osty is alive, he dies and you gain Block equal to double his Max HP.

A Retained Skill. If Osty is alive it kills him outright and gives you Block equal to twice his Max HP; if he is missing, the card is wasted. Max HP is what counts, not his current HP, so a wounded Osty is worth as much as a healthy one. The Block is card Block, so Dexterity applies. The upgrade drops the cost to 0.

Character
Necrobinder
Type
Skill
Rarity
Rare
Cost
10 Energy
Target
Yourself
Unlock
The GiantKill 15 Elites with the Necrobinder

When to take Sacrifice

A finisher for Summon decks, giving 40 or more Block for 1 Energy after a Reanimate or a couple of Summon triggers. Skip it in an Osty attack deck that wants him alive.

Cards that synergize with Sacrifice

Reanimate
Skill
3
Summon 20.
Exhaust.
Reanimate sets up 40 Block in one card.Summon 20.
Exhaust.
Sic 'Em
Attack
1
Osty deals 5 damage.
Whenever Osty hits this enemy this turn, Summon 3.
Sic 'Em and Pull Aggro pad his Max HP first.Osty deals 5 damage.
Whenever Osty hits this enemy this turn, Summon 3.
Pull Aggro
Skill
2
Summon 4.
Gain 7 Block.
Sic 'Em and Pull Aggro pad his Max HP first.Summon 4.
Gain 7 Block.
Bodyguard
Skill
1
Summon 5.
Bodyguard brings him back the same turn.Summon 5.
Afterlife
Skill
1
Summon 6.
Exhaust.
Afterlife is a cheap resummon after the sacrifice.Summon 6.
Exhaust.
Legion of Bone
Skill
2
ALL players Summon 6.
Exhaust.
Legion of Bone Summons Osty, whom Sacrifice counts onALL players Summon 6.
Exhaust.
Necro Mastery
Power
2
Summon 5.
Whenever Osty loses HP,
ALL enemies lose that much HP as well.
Necro Mastery Summons Osty, whom Sacrifice counts onSummon 5.
Whenever Osty loses HP,
ALL enemies lose that much HP as well.
Cleanse
Skill
1
Summon 3.
Exhaust 1 card from your Draw Pile.
Cleanse Summons Osty, whom Sacrifice counts onSummon 3.
Exhaust 1 card from your Draw Pile.
Dirge
Skill
X
Summon 3 X times.
Add X Souls into your Draw Pile.
Exhaust.
Dirge Summons Osty, whom Sacrifice counts onSummon 3 X times.
Add X Souls into your Draw Pile.
Exhaust.
Spur
Skill
1
Retain.
Summon 3.
Osty heals 5 HP.
Spur Summons Osty, whom Sacrifice counts onRetain.
Summon 3.
Osty heals 5 HP.
Invoke
Skill
1
Next turn, Summon 2 and gain .
Invoke Summons Osty, whom Sacrifice counts onNext turn, Summon 2 and gain .
Devour Life
Power
1
Whenever you play a Soul, Summon 1.
Devour Life Summons Osty, whom Sacrifice counts onWhenever you play a Soul, Summon 1.
Beacon of Hope
Power
1
Whenever you gain Block on your turn, other players gain half that much Block.
Beacon of Hope makes Block count for more, and Sacrifice gains itWhenever you gain Block on your turn, other players gain half that much Block.
Entrench
Skill
2
Double your Block.
Entrench makes Block count for more, and Sacrifice gains itDouble your Block.
Prolong
Skill
0
Next turn, gain Block equal to your current Block.
Exhaust.
Prolong makes Block count for more, and Sacrifice gains itNext turn, gain Block equal to your current Block.
Exhaust.

Relics that synergize with Sacrifice

Bound Phylactery
Bound Phylactery resummons him at each turn start.At the start of your turn, Summon 1.
Phylactery Unbound
Phylactery Unbound Summons Osty, whom Sacrifice counts onAt the start of each combat, Summon 5. At the start of your turn, Summon 2.
Parrying Shield
Parrying Shield makes Block count for more, and Sacrifice gains itIf you end a turn with at least 10 Block, deal 6 damage to a random enemy.
Sturdy Clamp
Sturdy Clamp makes Block count for more, and Sacrifice gains itUp to 10 Block persists across turns.
Pael's Legion
Pael's Legion makes Block count for more, and Sacrifice gains itDoubles Block gained from a card, then goes to sleep for 2 turns.
Vambrace
Vambrace makes Block count for more, and Sacrifice gains itThe first time you gain Block from a card each combat, double the amount gained.
✦
Spur
Skill
1
Retain.
Summon 3.
Osty heals 5 HP.
Snap
Attack
1
Osty deals 7 damage.
Add Retain to a card in your Hand.
Bone Shards
Attack
1
If Osty is alive, he deals 9 damage to ALL enemies and you gain 9 Block.
Osty dies.
Calcify
Power
1
Osty's attacks deal 4 additional damage.
Necro Mastery
Power
2
Summon 5.
Whenever Osty loses HP,
ALL enemies lose that much HP as well.
Protector
Attack
1
Osty deals 10 damage.
Deals additional damage equal to Osty's Max HP.
Rattle
Attack
1
Osty deals 7 damage.
Hits an additional time for each other time he has attacked this turn.
Sic 'Em
Attack
1
Osty deals 5 damage.
Whenever Osty hits this enemy this turn, Summon 3.

Changes by version

  1. 30 Jul 2026BuffOstyPlaytest
    Block gain increased from double to triple Osty's Max HP
  2. 18 Jun 2026Interfacev0.107.1
    Sacrifice card now previews how much Block it will gain
  3. 4 Jun 2026InterfaceDexterityFrailBeta branch
    Sacrifice card now previews how much Block it will gain, so that it's easier to plan with effects like Dexterity and Frail
All 11 patch notes8 older
  1. 6 Feb 2025Cost01Internal playtest
    Cost changed from 0 to 1 and upgrade changed from triple Block to decrease cost to 0
  2. 12 Dec 2024Retainno RetainRetainInternal playtest
    Added Retain
  3. 5 Dec 2024ExhaustExhaustno ExhaustInternal playtest
    Removed Exhaust
    TextOstyInternal playtest
    Sacrifice card now specifies that it only works if Osty is alive
  4. 1 Nov 2024ReworkInternal playtest
    Reworked the card
  5. 24 May 2024Bug fixInternal playtest
    Sacrifice and skip buttons in card reward screens no longer both glow when you hover over only one of them
  6. 4 May 2024ReworkOstyExhaustInternal playtest
    Now "Osty loses 5 HP. You heal to full HP. Exhaust."
  7. 8 Sep 2023RarityInternal playtest
    Sacrifice card energy gain increased from 3(4) to 4(5). Rarity changed from Uncommon to Rare
  8. 21 Apr 2023InterfaceOstyInternal playtest
    Update Sacrifice card from Destroy Osty to Kill Osty
    InterfaceOstyInternal playtest
    Update Sacrifice card wording again to imply Osty must be killed to gain energy

Internal playtest notes are from before the Early Access release. Names and numbers in them can differ from the game today.

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