Color Identity: R

Initial Card State
- All permanents on the battlefield.
Notable Prerequisites
- Helm of the Host attached to Éomer.
- Kari Zev does not have summoning sickness and cannot be blocked and killed by an opponent.
Steps
- At the beginning of your combat phase, Helm of the Host triggers, creating a nonlegendary token copy of Éomer with haste.
- Declare Kari Zev as an attacker.
- Kari Zev triggers, creating a legendary 2/1 Ragavan creature token that is tapped and attacking.
- Holding priority, activate Phyrexian Altar by sacrificing Ragavan, adding ({1} magic symbol)
. - When Ragavan dies, each Éomer that hasn't triggered this turn triggers, untapping all creatures you control and causing you to get at least one additional combat phase after this one.
- Repeat each combat phase.
Results
- Infinite combat phases.
- Infinite creature tokens with haste.
- Infinite death triggers.
- Infinite ETB.
- Infinite LTB.
- Infinite sacrifice triggers.
- Infinite colored mana.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).