Melira, Sylvok Outcast, Safehold Elite, and Phyrexian Altar

Prerequisites

• Melira, Sylvok Outcast on the battlefield
• Safehold Elite on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Safehold Elite, adding one mana of any color
2. Safehold Elite dies, triggering its persist ability, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Melira
3. Repeat

Results

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