Yenna, Redtooth Regent + Agatha's Soul Cauldron + Ashnod's Altar + Little Bear

Yenna, Redtooth Regent

Agatha's Soul Cauldron

Ashnod's Altar

Little Bear

How it works

1. Activate Little Bear using the Licid's ability by paying its activation cost, attaching Little Bear to Yenna and causing Little Bear to become an Aura.
2. Activate Yenna by paying 2 and tapping it, creating a token copy of Little Bear.
3. When the Little Bear token enters, it triggers, untapping Yenna.
4. Activate Ashnod's Altar by sacrificing the Little Bear token, adding CC.
5. Repeat from step 2.

This intricate loop turns Yenna, Redtooth Regent into an enchantment-copying engine by relying on Little Bear's ability to transform into an Aura, which cleverly triggers Yenna's untap condition whenever a copy enters the battlefield. To pull this off, Agatha's Soul Cauldron plays a vital hidden role: it grants creatures with +1/+1 counters the activated ability needed to turn Little Bear into an Aura in the first place, ensuring the sequence can begin. Once the token enters and untaps Yenna, Ashnod's Altar steps in to sacrifice the Little Bear token, feeding you colorless mana to fuel the next iteration of the loop.