Rhys, the Evermore, Reveillark, Solemnity, and Ashnod's Altar

Prerequisites

• Rhys, the Evermore in hand or in the command zone
• Reveillark on the battlefield
• Solemnity on the battlefield
• Ashnod's Altar on the battlefield
• plus commander tax if applicable available

Steps

1. Cast Rhys by paying plus commander tax if applicable
2. When Rhys enters, it triggers, giving Reveillark persist until end of turn
3. Activate Ashnod's Altar by sacrificing Rhys
4. Activate Ashnod's Altar by sacrificing Reveillark
5. When Reveillark dies, its ability and its persist ability trigger
6. Resolve the persist trigger, returning Reveillark from your graveyard to the battlefield without a -1/-1 counter on it due to Solemnity
7. Resolve the second trigger, returning Rhys from your graveyard to the battlefield
8. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite death triggers
• Infinite sacrifice triggers