edhseer Commander synergy, explained
Enchantment
Mana cost: {1}{U}{U}
Whenever a player casts a spell, counter that spell unless that player pays {X}, where X is the number of cards in all graveyards with the same name as the spell.
triggered —
Causes: counter a spell.
Cares about: a spell is cast.
an enchantment is cast — 3,673 cards in the game can cause this (Cephalid Shrine is one).
When Cephalid Shrine is cast:
255 other cards care about it too. These are the ones with the most connections.
a nontoken enchantment enters the battlefield — 3,691 cards in the game can cause this (Cephalid Shrine is one).
an enchantment enters the battlefield — 3,743 cards in the game can cause this (Cephalid Shrine is one).
When Cephalid Shrine enters:
59 other cards care about it too. These are the ones with the most connections.
anything enters the battlefield — 26,499 cards in the game can cause this (Cephalid Shrine is one).
20 other cards care about it too. These are the ones with the most connections.