Traveling Plague + Archon of Sun's Grace + Yahenni, Undying Partisan

Traveling Plague

Archon of Sun's Grace

Yahenni, Undying Partisan

How it works

1. Cast Traveling Plague by paying 3, attaching it to another creature you control.
2. When Traveling Plague enters, Archon of Sun's Grace triggers, creating a creature token.
3. Activate Yahenni by sacrificing the creature Traveling Plague is attached to.
4. When the creature dies, Traveling Plague triggers, returning itself from your graveyard to the battlefield attached to the token created in step 2.
5. When Traveling Plague enters, Archon of Sun's Grace triggers, creating a creature token.
6. Resolve the Yahenni ability.
7. Repeat from step 3.

This clever loop turns the self-recurring nature of Traveling Plague into a relentless engine by utilizing the creature it enchants as a perpetual sacrifice fodder for Yahenni, Undying Partisan. Whenever the enchanted creature dies to fuel Yahenni, Traveling Plague's built-in safety net immediately returns it from the graveyard to the battlefield attached to a fresh target—which in this case is the 2/2 white Pegasus token generated by Archon of Sun's Grace's constellation ability. Because every single re-entry of Traveling Plague triggers the Archon anew, you create an endless cycle of enchanting, sacrificing, and token generation that piles up countless triggers.