edhseer Commander synergy, explained
Instant
Mana cost: {U}{U}
As an additional cost to cast this spell, you may reveal a Dragon card from your hand.
Counter target spell unless its controller pays {1}. If you revealed a Dragon card or controlled a Dragon as you cast this spell, counter that spell instead.
on-cast —
on-cast —
Causes: counter a spell.
Cares about: nothing.
an instant is cast — 3,931 cards in the game can cause this (Silumgar's Scorn is one).
When Silumgar's Scorn 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 (Silumgar's Scorn is one).
When Silumgar's Scorn is cast:
5 other cards care about it too. These are the ones with the most connections.