Melira, Sylvok Outcast, Phyrexian Altar, and Gravelgill Axeshark

Prerequisites

• Melira, Sylvok Outcast on the battlefield
• Phyrexian Altar on the battlefield
• Gravelgill Axeshark on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Gravelgill Axeshark
2. When Gravelgill Axeshark dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Melira
3. Repeat

Results

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