edhseer Commander synergy, explained
Instant
Mana cost: {W}
One or more target creatures become white until end of turn.
on-cast — makes your creatures bigger
Causes: nothing.
Cares about: nothing.
an instant is cast — 3,931 cards in the game can cause this (Heaven's Gate is one).
When Heaven's Gate 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 (Heaven's Gate is one).
When Heaven's Gate is cast:
5 other cards care about it too. These are the ones with the most connections.