edhseer Commander synergy, explained
Instant
Mana cost: {2}{B}
Target creature gets -X/-X until end of turn, where X is the number of cards in your hand.
on-cast — shrinks a creature
Causes: nothing.
Cares about: nothing.
an instant is cast — 3,931 cards in the game can cause this (Nightmarish End is one).
When Nightmarish End is cast:
427 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 (Nightmarish End is one).
When Nightmarish End is cast:
5 other cards care about it too. These are the ones with the most connections.