Unholy Grotto

a Zombie in a graveyard — 29 cards in the game can cause this.

1. Apprentice Necromancer — When Apprentice Necromancer is in the graveyard, Unholy Grotto can bring it back
2. Deathmark Prelate — Deathmark Prelate puts cards into the graveyard that Unholy Grotto can bring back
3. Ravenous Rotbelly — Ravenous Rotbelly puts cards into the graveyard that Unholy Grotto can bring back
4. Wilhelt, the Rotcleaver — Wilhelt, the Rotcleaver puts cards into the graveyard that Unholy Grotto can bring back
5. Plague Dogs — When Plague Dogs is in the graveyard, Unholy Grotto can bring it back
6. Haunted Cadaver — When Haunted Cadaver is in the graveyard, Unholy Grotto can bring it back
7. Liliana's Steward — When Liliana's Steward is in the graveyard, Unholy Grotto can bring it back
8. Balduvian Fallen — When Balduvian Fallen is in the graveyard, Unholy Grotto can bring it back
9. Cleaver Skaab — Cleaver Skaab puts cards into the graveyard that Unholy Grotto can bring back
10. Kalitas, Traitor of Ghet — Kalitas, Traitor of Ghet puts cards into the graveyard that Unholy Grotto can bring back
11. Silversmote Ghoul — When Silversmote Ghoul is in the graveyard, Unholy Grotto can bring it back
12. Wall of Limbs — When Wall of Limbs is in the graveyard, Unholy Grotto can bring it back
13. Nim Replica — When Nim Replica is in the graveyard, Unholy Grotto can bring it back
14. Gangrenous Zombies — When Gangrenous Zombies is in the graveyard, Unholy Grotto can bring it back
15. Priest of the Haunted Edge — When Priest of the Haunted Edge is in the graveyard, Unholy Grotto can bring it back
16. Barrow Ghoul — When Barrow Ghoul is in the graveyard, Unholy Grotto can bring it back
17. Rotting Giant — When Rotting Giant is in the graveyard, Unholy Grotto can bring it back
18. Crypt Creeper — When Crypt Creeper is in the graveyard, Unholy Grotto can bring it back
19. Famished Ghoul — When Famished Ghoul is in the graveyard, Unholy Grotto can bring it back
20. Phylactery Lich — When Phylactery Lich is in the graveyard, Unholy Grotto can bring it back

29 other cards care about it too. These are the ones with the most connections.

a land enters the battlefield — 1,560 cards in the game can cause this (Unholy Grotto is one).

When Unholy Grotto enters:

1. Primeval Bounty — gains you 3 life
2. Toph, Earthbending Master — puts a counter on a permanent
3. Dancing from Dark to Dawn — makes a token
4. Emeria Shepherd — brings a card back
5. Quest for the Necropolis — puts a quest counter on itself
6. Soul Stair Expedition — puts a quest counter on itself
7. Nissa of Shadowed Boughs — puts counters on a permanent
8. Thranduil, Sindarin Liege // Silvan Rally — makes a token
9. Silvan Reveler — returns itself from the graveyard
10. Floral Evoker — puts a +1/+1 counter on itself

199 other cards care about it too. These are the ones with the most connections.

anything leaves a graveyard — 2,503 cards in the game can cause this (Unholy Grotto is one).

When a Zombie leaves a graveyard thanks to Unholy Grotto:

1. Blastoneuron — makes each opponent lose 1 life
2. Defiled Crypt // Cadaver Lab — makes a token
3. Teval, the Balanced Scale — makes a token
4. Hologram Stalker — makes a token
5. Tormod, the Desecrator — makes a token
6. Quintorius, Field Historian — makes a token
7. Garrison Excavator — makes a token
8. Amzu, Swarm's Hunger — makes a token
9. Kirol, History Buff // Pack a Punch — becomes prepared
10. Teval's Judgment — triggers

13 other cards care about it too. These are the ones with the most connections.