Antewise

Bone Shards — Necrobinder Attack Card in Slay the Spire 2

Updated 17 Oct 2026 Source Slay the Spire 2 card data (spire-codex.com API), 577 cards retrieved 17 October 2026 By
Data status: The facts on this page were checked against the source named above. Game values can still shift with a patch, so re-check anything that looks off.
Bone Shards card art
Bone Shards

If Osty is alive, he deals 9 damage to ALL enemies and you gain 9 Block. Osty dies.

CharacterNecrobinder
TypeAttack
RarityUncommon
Cost1 Energy
TargetAllEnemies
Total damage9
Per Energy9.00 → 9.00 upgraded
TagsOstyAttack

Card text

If Osty is alive, he deals 9 damage to ALL enemies and you gain 9 Block. Osty dies.

Upgraded: If Osty is alive, he deals 12 damage to ALL enemies and you gain 12 Block. Osty dies.

Where it sits on the curve

Measured the same way as our efficiency tier list: total damage divided by Energy.

Bone Shards produces 9.00 per Energy at base . That ranks it 37 of 143 of the 143 attacks with a fixed cost. It sits in the top 75% on this measure.

The measure ignores everything that is not a number. Area damage, conditions and drawbacks are not priced in.

Other Necrobinder cards at 1 Energy

  • Afterlife — Summon 6.
  • Blight Strike — Deal 8 damage. Apply Doom equal to damage dealt.
  • Bodyguard — Summon 5.
  • Borrowed Time — Gain 4 Energy. Cards cost an additional 1 Energy this turn.
  • Calcify — Osty's attacks deal 4 additional damage.
  • Call of the Void — At the start of your turn, add 1 random card into your Hand. It gains Ethereal.

Where to go next

All 577 cards — the full table, filterable by character. Efficiency tier list — every measurable card ranked.

Rarity system explains how often this card appears. Enchantments covers the modifiers that can change it.

Frequently asked questions

What does Bone Shards do in Slay the Spire 2?

If Osty is alive, he deals 9 damage to ALL enemies and you gain 9 Block. Osty dies.

What does upgrading Bone Shards change?

If Osty is alive, he deals 12 damage to ALL enemies and you gain 12 Block. Osty dies.

How much does Bone Shards cost?

1 Energy. It is a Uncommon Attack card.

Is Bone Shards efficient for its cost?

It produces 9.00 damage per Energy, which ranks 37 of 143 among the attacks that can be measured this way.

More Slay the Spire 2 guides

Sources

Figures and item data on this site are read from the game’s own reference wiki before publishing. Where a value could not be confirmed there, the page says so instead of filling the gap.