edhseer Commander synergy, explained
Instant
Mana cost: {U}
Counter target spell if it was kicked.
on-cast —
Causes: counter a spell.
Cares about: nothing.
an instant is cast — 3,931 cards in the game can cause this (Ertai's Trickery is one).
When Ertai's Trickery 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 (Ertai's Trickery is one).
When Ertai's Trickery is cast:
5 other cards care about it too. These are the ones with the most connections.