edhseer Commander synergy, explained
Instant
Mana cost: {X}{W}{U}
Choose a color. X target creatures gain protection from the chosen color until end of turn.
on-cast — grants a keyword
Causes: nothing.
Cares about: nothing.
an instant is cast — 3,931 cards in the game can cause this (Prismatic Boon is one).
When Prismatic Boon 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 (Prismatic Boon is one).
When Prismatic Boon is cast:
5 other cards care about it too. These are the ones with the most connections.