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

Prerequisites

• Yenna, Redtooth Regent on the battlefield
• Angelic Renewal on the battlefield
• Ashnod's Altar on the battlefield
• Hammer of Purphoros on the battlefield
• available

Steps

1. Activate Yenna by paying and tapping it, creating a token copy of Angelic Renewal
2. Activate Ashnod's Altar by sacrificing Yenna, adding
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

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers