Yenna, Redtooth Regent + Angelic Renewal + Ashnod's Altar + Tuktuk Rubblefort

Yenna, Redtooth Regent

Angelic Renewal

Ashnod's Altar

Tuktuk Rubblefort

How it works

1. Activate Yenna by paying 2 and tapping it, creating a token copy of Angelic Renewal.
2. Activate Ashnod's Altar by sacrificing Yenna, adding CC.
3. When Yenna dies, both Angelic Renewals trigger.
4. Resolve the first trigger, choosing to sacrifice either Angelic Renewal and return Yenna from your graveyard to the battlefield.
5. Resolve the second trigger, choosing not to pay.
6. Repeat.

This loop relies on Yenna, Redtooth Regent to constantly replenish our sacrificial fodder by duplicating Angelic Renewal. Whenever Yenna goes to the graveyard via Ashnod's Altar, both Angelic Renewals trigger to bring her right back, leaving one behind while the other is sacrificed to the effect. Tuktuk Rubblefort isn't actively tapped during the loop, but its passive ability ensures Yenna gains haste the moment she returns, allowing her to be tapped for mana or activated again if needed.