Yenna, Redtooth Regent + Ashnod's Altar + Jump Scare + Bounding Krasis

Yenna, Redtooth Regent

Ashnod's Altar

Jump Scare

Bounding Krasis

How it works

1. Cast Jump Scare by paying , targeting Bounding Krasis.
2. Activate Yenna by paying 2 and tapping it, creating a token copy of Bounding Krasis.
3. When the Bounding Krasis token enters, it triggers, untapping Yenna.
4. Activate Ashnod's Altar by sacrificing the Bounding Krasis token, adding CC.
5. Repeat from step 2.

This clever loop begins with Jump Scare, which transforms Bounding Krasis into an enchantment creature so it becomes a valid target for Yenna, Redtooth Regent. Once the stage is set, Yenna taps to replicate the Krasis, whose enter-the-battlefield trigger neatly untaps Yenna in return. Feeding that newly minted copy into Ashnod's Altar yields the colorless mana needed to fund Yenna's ability all over again, creating a self-sustaining engine of endless sacrifices.