edhseer Commander synergy, explained
Instant
Mana cost: {2}{B}
Choose target creature card in a graveyard that was put there from the battlefield this turn. Put that card onto the battlefield under your control.
on-cast — brings a card back
Causes: put a creature onto the battlefield, a creature leaves a graveyard.
Cares about: a creature in a graveyard.
a creature leaves a graveyard — 1,302 cards in the game can cause this (Grim Return is one).
When a creature leaves a graveyard thanks to Grim Return:
3 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 (Grim Return is one).
When a creature leaves a graveyard thanks to Grim Return:
13 other cards care about it too. These are the ones with the most connections.
an instant is cast — 3,931 cards in the game can cause this (Grim Return is one).
When Grim Return is cast:
427 other cards care about it too. These are the ones with the most connections.
a nontoken creature enters the battlefield — 18,448 cards in the game can cause this (Grim Return is one).
When a creature enters thanks to Grim Return:
23 other cards care about it too. These are the ones with the most connections.
a creature enters the battlefield — 19,800 cards in the game can cause this (Grim Return is one).
298 other cards care about it too. These are the ones with the most connections.
anything enters the battlefield — 26,499 cards in the game can cause this (Grim Return is one).
21 other cards care about it too. These are the ones with the most connections.
anything is cast — 31,128 cards in the game can cause this (Grim Return is one).
When Grim Return is cast:
6 other cards care about it too. These are the ones with the most connections.