Yenna, Redtooth Regent + Ashnod's Altar + Secret Arcade // Dusty Parlor + Hyrax Tower Scout

Yenna, Redtooth Regent

Ashnod's Altar

Secret Arcade // Dusty Parlor

Hyrax Tower Scout

How it works

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

This clever loop relies on Secret Arcade // Dusty Parlor to fundamentally rewrite the rules of your board, making its Dusty Parlor side turn all nonland permanents you control into enchantments. This transformation is the linchpin that allows Yenna, Redtooth Regent to target a creature like Hyrax Tower Scout—now recognized as an enchantment—and copy it with her tap ability. When the resulting token enters the battlefield, its ability untaps Yenna, while sacrificing that token to Ashnod's Altar provides the exact mana needed to pay Yenna's activation cost again.