Yenna, Redtooth Regent + Ashnod's Altar + Enchanted Evening + Deceiver Exarch

Yenna, Redtooth Regent

Ashnod's Altar

Enchanted Evening

Deceiver Exarch

How it works

1. Activate Yenna by paying 2 and tapping it, creating a token copy of Deceiver Exarch.
2. When the Deceiver Exarch token enters, it triggers, untapping Yenna.
3. Activate Ashnod's Altar by sacrificing the Deceiver Exarch token, adding CC.
4. Repeat.

This loop is a masterclass in turning a creature into a repeatable engine, powered by Enchanted Evening making every permanent on your board an enchantment so that Yenna, Redtooth Regent can target them. By using Yenna's ability to copy Deceiver Exarch, you trigger the Exarch's entry ability to untap Yenna, instantly readying her to go again. Meanwhile, Ashnod's Altar provides the colorless mana required for Yenna's activation fee by feeding on the sacrificed Exarch token, completing a self-sustaining cycle of creation, untapping, and sacrifice.