edhseer Commander synergy, explained
Legendary Creature — Human Avatar
Mana cost: {3}{R}{R}{R}
Whenever a player attacks, add six {R}. Until end of combat, you don't lose this mana as steps end.
triggered — adds 6 mana
Target creature gets +3/+0 until end of turn.
activated {R}{R}{R} — gives +3/+0
Causes: nothing.
Cares about: anything attacks.
hits creature — 495 cards in Avatar Roku's colors can cause this (Avatar Roku is one).
6 other cards care about it too. These are the ones with the most connections.
a Human enters the battlefield — 661 cards in Avatar Roku's colors can cause this (Avatar Roku is one).
When Avatar Roku, Firebender enters:
a creature attacks — 3,451 cards in Avatar Roku's colors can cause this (Avatar Roku is one).
When Avatar Roku, Firebender attacks:
59 other cards care about it too. These are the ones with the most connections.
a creature blocks — 3,451 cards in Avatar Roku's colors can cause this (Avatar Roku is one).
When Avatar Roku, Firebender blocks:
1 other card cares about it too. These are the ones with the most connections.
anything attacks — 3,451 cards in Avatar Roku's colors can cause this (Avatar Roku is one).
When Avatar Roku, Firebender attacks:
18 other cards care about it too. These are the ones with the most connections.
a creature is cast — 3,468 cards in Avatar Roku's colors can cause this (Avatar Roku is one).
When Avatar Roku, Firebender is cast:
10 other cards care about it too. These are the ones with the most connections.
a nontoken creature enters the battlefield — 3,511 cards in Avatar Roku's colors can cause this (Avatar Roku is one).
When Avatar Roku, Firebender enters:
a creature enters the battlefield — 3,801 cards in Avatar Roku's colors can cause this (Avatar Roku is one).
When Avatar Roku, Firebender enters:
58 other cards care about it too. These are the ones with the most connections.