Infinite combat phases, Infinite death triggers, Infinite ETB, Infinite LTB, Infinite mana creatures you control can produce, Infinite untap of creatures you control
Declare Éomer as an attacker.
Éomer's myriad ability triggers, creating at least two token copies of it tapped and attacking each other opponent.
Put all Éomer tokens into your graveyard due to the legend rule.
When the Éomer token(s) die, each Éomer token triggers, untapping all creatures you control and causing you to get an additional combat phase after this one.
Repeat each combat phase.
Component Cards
How It Works
Declare Éomer as an attacker.
Éomer's myriad ability triggers, creating at least two token copies of it tapped and attacking each other opponent.
Put all Éomer tokens into your graveyard due to the legend rule.
When the Éomer token(s) die, each Éomer token triggers, untapping all creatures you control and causing you to get an additional combat phase after this one.
Repeat each combat phase.