edhseer Commander synergy, explained
Instant
Mana cost: {4}{U}{U}
Each nonland permanent you control becomes a copy of target non-Aura permanent.
on-cast — copies a permanent
Causes: copy a permanent.
Cares about: nothing.
an instant is cast — 3,931 cards in the game can cause this (Mirrorform is one).
When Mirrorform 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 (Mirrorform is one).
When Mirrorform is cast:
5 other cards care about it too. These are the ones with the most connections.