edhseer Commander synergy, explained
Instant
Mana cost: {X}{B}
Up to one target creature gets -X/-X until end of turn. If X is 5 or more, return a creature card with mana value X or less from your graveyard to the battlefield tapped.
on-cast — shrinks a creature by -X/-X
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 (Black Sun's Twilight is one).
When a creature leaves a graveyard thanks to Black Sun's Twilight:
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 (Black Sun's Twilight is one).
When a creature leaves a graveyard thanks to Black Sun's Twilight:
13 other cards care about it too. These are the ones with the most connections.
a creature in a graveyard — 2,769 cards in the game can cause this (Black Sun's Twilight is one).
2,768 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 (Black Sun's Twilight is one).
When Black Sun's Twilight 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 (Black Sun's Twilight is one).
When a creature enters thanks to Black Sun's Twilight:
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 (Black Sun's Twilight 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 (Black Sun's Twilight 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 (Black Sun's Twilight is one).
When Black Sun's Twilight is cast:
6 other cards care about it too. These are the ones with the most connections.