Three pieces, one kit
Osty is the Necrobinder’s companion, a skeletal hand that attacks and takes hits for her. Everything else in the kit exists to keep him on the board.
Summon brings Osty back and restores his health. Soul is the resource the summons run on. Doom is the status you stack while he holds the line.
The 13 cards that attack through Osty
Thirteen cards carry the OstyAttack tag, and none of them deal damage themselves. The damage is Osty, so these cards stop working the moment he dies.
| Card | Cost | Effect | Upgraded |
|---|---|---|---|
| Bone Shards | 1 Energy | If Osty is alive, he deals 9 damage to ALL enemies and you gain 9 Block.; Osty dies. | If Osty is alive, he deals 12 damage to ALL enemies and you gain 12 Block.; Osty dies. |
| Fetch | 0 Energy | Osty deals 3 damage.; If this is the first time this card has been played this turn, draw 1 card. | Osty deals 6 damage.; If this is the first time this card has been played this turn, draw 1 card. |
| Flatten | 2 Energy | Osty deals 12 damage.; This card costs 0 1 Energy if Osty has attacked this turn. | Osty deals 16 damage.; This card costs 0 1 Energy if Osty has attacked this turn. |
| High Five | 2 Energy | Osty deals 11 damage; and applies 2 Vulnerable; to ALL enemies. | Osty deals 13 damage; and applies 3 Vulnerable; to ALL enemies. |
| Poke | 0 Energy | Osty deals 6 damage. | Osty deals 9 damage. |
| Protector | 1 Energy | Osty deals 10 damage.; Deals additional damage equal to Osty’s Max HP. | - |
| Rattle | 1 Energy | Osty deals 7 damage.; Hits an additional time for each other time he has attacked this turn. | Osty deals 9 damage.; Hits an additional time for each other time he has attacked this turn. |
| Right Hand Hand | 0 Energy | Osty deals 4 damage.; Whenever you play a card that costs 2 Energy or more, return this to your Hand from the Discard Pile. | Osty deals 6 damage.; Whenever you play a card that costs 2 Energy or more, return this to your Hand from the Discard Pile. |
| Sic ‘Em | 1 Energy | Osty deals 5 damage.; Whenever Osty hits this enemy this turn, Summon 3. | Osty deals 6 damage.; Whenever Osty hits this enemy this turn, Summon 4. |
| Snap | 1 Energy | Osty deals 7 damage.; Add Retain to a card in your Hand. | Osty deals 10 damage.; Add Retain to a card in your Hand. |
| Squeeze | 3 Energy | Osty deals 25 damage.; Deals 5 additional damage for ALL your other Osty Attacks. | Osty deals 25 damage.; Deals 6 additional damage for ALL your other Osty Attacks. |
| Sweeping Gaze | 0 Energy | Osty deals 10 damage to a random enemy. | Osty deals 15 damage to a random enemy. |
| Unleash | 1 Energy | Osty deals 6 damage.; Deals additional damage equal to Osty’s current HP. | - |
The 12 cards that Summon
These are how Osty comes back. Summon restores him, and the rest either raise the Summon count or reward you for having him out.
| Card | Cost | Effect | Upgraded |
|---|---|---|---|
| Afterlife | 1 Energy | Summon 6. | Summon 9. |
| Bodyguard | 1 Energy | Summon 5. | Summon 7. |
| Cleanse | 1 Energy | Summon 3.; Exhaust 1 card from your Draw Pile. | Summon 5.; Exhaust 1 card from your Draw Pile. |
| Devour Life | 1 Energy | Whenever you play a Soul, Summon 1. | Whenever you play a Soul, Summon 2. |
| Dirge | X Energy | Summon 3 X times.; Add X Souls into your Draw Pile. | Summon 4 X times.; Add X Souls+ into your Draw Pile. |
| Invoke | 1 Energy | Next turn, Summon 2 and gain 2 Energy. | Next turn, Summon 3 and gain 3 Energy. |
| Legion of Bone | 2 Energy | ALL players Summon 6. | ALL players Summon 8. |
| Necro Mastery | 2 Energy | Summon 5.; Whenever Osty loses HP,; ALL enemies lose that much HP as well. | Summon 8.; Whenever Osty loses HP,; ALL enemies lose that much HP as well. |
| Pull Aggro | 2 Energy | Summon 4.; Gain 7 Block. | Summon 5.; Gain 9 Block. |
| Reanimate | 3 Energy | Summon 20. | Summon 25. |
| Sic ‘Em | 1 Energy | Osty deals 5 damage.; Whenever Osty hits this enemy this turn, Summon 3. | Osty deals 6 damage.; Whenever Osty hits this enemy this turn, Summon 4. |
| Spur | 1 Energy | Summon 3.; Osty heals 5 HP. | Summon 5.; Osty heals 7 HP. |
Keeping him alive
Sacrifice trades Osty for Block. Spur brings him back and heals him. Both exist because losing him shuts off all thirteen attack cards at once.
Calcify raises his damage, and Necro Mastery raises the Summon count. Those two are the scaling pieces.
Sic ‘Em sits in both lists, because it attacks through Osty and also summons.
Soul and Doom
Eleven cards work with Soul, and thirteen work with Doom. Soul fuels the summons. Doom is what you stack to cash in later, and it has its own page.
Where to go next
Doom keyword covers the status the kit cashes in. Necrobinder guide covers the rest of her pool.