Tombstalker

Creature — Demon

Produces: nothing.

Cares about: a card in a graveyard.

Partners

223 cards can cause a Demon it grants abilities to.

1. Ardyn, the Usurper — Ardyn, the Usurper gives Tombstalker an extra ability

6,862 cards can cause a card in a graveyard.

1. Heart-Shaped Herb — Heart-Shaped Herb fills the graveyard Tombstalker delves from
2. Victimize — Victimize fills the graveyard Tombstalker delves from
3. Come Back Wrong — Come Back Wrong fills the graveyard Tombstalker delves from
4. Bound // Determined — Bound // Determined fills the graveyard Tombstalker delves from
5. Boneshard Slasher — Boneshard Slasher fills the graveyard Tombstalker delves from
6. Wayward Angel — Wayward Angel fills the graveyard Tombstalker delves from
7. Shattergang Brothers — Shattergang Brothers fills the graveyard Tombstalker delves from
8. Ruthless Technomancer — Ruthless Technomancer fills the graveyard Tombstalker delves from

6,854 other cards ask for it too, equally specific. The ones shown are the best connected.