Brotherhood Outcast, Ashnod's Altar, and Ferocity of the Hunt

Prerequisites

• Brotherhood Outcast on the battlefield
• Ashnod's Altar on the battlefield
• Ferocity of the Hunt on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Brotherhood Outcast
2. When Brotherhood Outcast dies, Ferocity of the Hunt triggers, returning Brotherhood Outcast from your graveyard to the battlefield
3. When Brotherhood Outcast enters the battlefield, it triggers, returning Ferocity of the Hunt from your graveyard to the battlefield attached to Brotherhood Outcast
4. Repeat

Results

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