edhseer Commander synergy, explained
Creature — Siren
Mana cost: {1}{U}
Flash
Flying
When this creature enters, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue.
triggered — shrinks a creature
Causes: nothing.
Cares about: nothing.
anything attacks — 17,934 cards in the game can cause this (Threnody Singer is one).
When Threnody Singer attacks:
111 other cards care about it too. These are the ones with the most connections.
a creature attacks — 17,934 cards in the game can cause this (Threnody Singer is one).
When Threnody Singer attacks:
180 other cards care about it too. These are the ones with the most connections.
a creature blocks — 17,934 cards in the game can cause this (Threnody Singer is one).
When Threnody Singer blocks:
18 other cards care about it too. These are the ones with the most connections.
a nontoken creature attacks — 17,934 cards in the game can cause this (Threnody Singer is one).
When Threnody Singer attacks:
a creature deals combat damage — 17,934 cards in the game can cause this (Threnody Singer is one).
When Threnody Singer deals combat damage:
194 other cards care about it too. These are the ones with the most connections.
a creature is cast — 18,010 cards in the game can cause this (Threnody Singer is one).
When Threnody Singer is cast:
81 other cards care about it too. These are the ones with the most connections.
a nontoken creature enters the battlefield — 18,448 cards in the game can cause this (Threnody Singer is one).
When Threnody Singer enters:
26 other cards care about it too. These are the ones with the most connections.
a creature enters the battlefield — 19,800 cards in the game can cause this (Threnody Singer is one).
When Threnody Singer enters:
299 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 (Threnody Singer is one).
39 other cards care about it too. These are the ones with the most connections.