edhseer Commander synergy, explained
Instant
Mana cost: {1}{U}{U}
This spell costs {1} less to cast if you control three or more artifacts.
on-cast — costs 1 less
Counter target spell.
on-cast —
Causes: counter a spell.
Cares about: an artifact you control.
an artifact you control — 3,641 cards in the game can cause this (Stoic Rebuttal is one).
3,631 other cards care about it too. These are the ones with the most connections.
an instant is cast — 3,931 cards in the game can cause this (Stoic Rebuttal is one).
When Stoic Rebuttal 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 (Stoic Rebuttal is one).
When Stoic Rebuttal is cast:
5 other cards care about it too. These are the ones with the most connections.