Adarkar Valkyrie + Sparring Mummy + Phyrexian Altar

Prerequisites

• Adarkar Valkyrie does not have summoning sickness.

Steps

1. 1Activate Adarkar Valkyrie by tapping it, making it so the next time Sparring Mummy dies this turn it will be returned to the battlefield.
2. 2Activate Phyrexian Altar by sacrificing Sparring Mummy, adding one mana of any color.
3. 3Adarkar Valkyrie triggers, returning Sparring Mummy to the battlefield.
4. 4Sparring Mummy enters the battlefield, untapping Adarkar Valkyrie.
5. 5Repeat.

Effects

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