Yenna, Redtooth Regent + Ashnod's Altar + Secret Arcade // Dusty Parlor + Deceiver Exarch

Yenna, Redtooth Regent

Ashnod's Altar

Secret Arcade // Dusty Parlor

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 clever loop transforms Yenna, Redtooth Regent into an infinite replication engine by turning a humble creature into a valid target for her ability. That transformation is made possible by Secret Arcade // Dusty Parlor, a brilliant piece of infrastructure whose passive ability ensures that nonland permanents you control are enchantments in addition to their other types, letting Yenna target Deceiver Exarch. Once the copied Deceiver Exarch enters the battlefield, its triggered ability untaps Yenna, while Ashnod's Altar converts the token into the mana needed to repeat the process indefinitely.