edhseer Commander synergy, explained
Legendary Creature — Spirit Dragon
Mana cost: {5}{G}{U}{R}
Flying, protection from white and from black
When Ureni enters, it deals X damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control, where X is the number of lands you control.
triggered — deals damage
Causes: a creature deals noncombat damage, a planeswalker deals noncombat damage.
Cares about: nothing.
hits creature — 1,370 cards in Ureni's colors can cause this.
15 other cards care about it too. These are the ones with the most connections.
a Dragon deals combat damage — 315 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending deals combat damage:
a Dragon attacks — 315 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending attacks:
a nontoken Dragon enters the battlefield — 324 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending enters:
a Dragon enters the battlefield — 358 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending enters:
1 other card cares about it too. These are the ones with the most connections.
a nontoken Spirit enters the battlefield — 333 cards in Ureni's colors can cause this (Ureni is one).
a Spirit enters the battlefield — 371 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending enters:
anything deals noncombat damage — 2,330 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending deals noncombat damage:
28 other cards care about it too. These are the ones with the most connections.
a creature attacks — 9,684 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending attacks:
102 other cards care about it too. These are the ones with the most connections.
anything attacks — 9,684 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending attacks:
43 other cards care about it too. These are the ones with the most connections.
a creature blocks — 9,684 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending blocks:
11 other cards care about it too. These are the ones with the most connections.
a creature enters the battlefield — 10,588 cards in Ureni's colors can cause this (Ureni is one).
When Ureni, the Song Unending enters:
169 other cards care about it too. These are the ones with the most connections.