Warbeast of Gorgoroth, Ashnod's Altar, and Primal Vigor

Prerequisites

• Warbeast of Gorgoroth on the battlefield
• Ashnod's Altar on the battlefield
• Primal Vigor on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing the creature with power 4 or greater, adding When the creature dies, Warbeast of Gorgoroth triggers, creating a 0/0 Army creature token if you don't control one, then putting four +1/+1 counters on an Army you control
2. Repeat

Results

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