edhseer Commander synergy, explained
Instant
Mana cost: {2}{U}
Counter target spell unless its controller pays {3}.
on-cast —
Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
on-cast — puts cards into your hand
Causes: you face a dilemma, counter a spell.
Cares about: nothing.
you face a dilemma — 739 cards in the game can cause this (Supreme Will is one).
When Supreme Will poses a dilemma:
an instant is cast — 3,931 cards in the game can cause this (Supreme Will is one).
When Supreme Will 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 (Supreme Will is one).
When Supreme Will is cast:
5 other cards care about it too. These are the ones with the most connections.