edhseer Commander synergy, explained
Instant
Mana cost: {2}{U}
If you control a commander, you may cast this spell without paying its mana cost.
on-cast —
Counter target noncreature spell.
on-cast —
Causes: cast a spell, counter an artifact, counter a battle, counter an enchantment, counter an instant, counter a planeswalker, counter a sorcery.
Cares about: nothing.
a spell is cast — 155 cards in the game can cause this (Fierce Guardianship is one).
When Fierce Guardianship is cast:
452 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 (Fierce Guardianship is one).
When Fierce Guardianship 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 (Fierce Guardianship is one).
When Fierce Guardianship is cast:
2 other cards care about it too. These are the ones with the most connections.