Yenna, Redtooth Regent + Angelic Renewal + Ashnod's Altar + Hammer of Purphoros

Yenna, Redtooth Regent

Angelic Renewal

Ashnod's Altar

Hammer of Purphoros

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 clever loop uses Yenna, Redtooth Regent to endlessly duplicate Angelic Renewal, turning a modest mana investment into a storm of triggers. Because Yenna's copied enchantment isn't legendary, sacrificing the original Yenna to Ashnod's Altar immediately triggers both copies of Angelic Renewal sitting in your graveyard. One of those triggers brings Yenna right back to the battlefield, leaving the second Angelic Renewal behind to sustain the next iteration while Ashnod's Altar fuels the continuous mana cost. Meanwhile, Hammer of Purphoros sits passively on the board to ensure any creatures you care about diving into this engine can act immediately with haste.