Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight, Ashnod's Altar, and Spiteful Squad

Prerequisites

• Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight on the battlefield
• Ashnod's Altar on the battlefield
• Spiteful Squad on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Spiteful Squad
2. When Spiteful Squad dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect
3. Repeat

Results

• Infinite +1/+1 counters on creatures you control
• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite death triggers
• Infinite recursion of creatures you control
• Infinite sacrifice triggers