Leonardo, Sewer Samurai + Solemnity + Phyrexian Altar + Ornithopter

Prerequisites

• You control a nontoken creature that has power or toughness 1 or less and that can be cast using one colored mana.

Steps

1. 1Activate Phyrexian Altar by sacrificing Ornithopter.
2. 2Cast Ornithopter from your graveyard by paying . It will not enter with a finality counter on it due to Solemnity.
3. 3Repeat.
4. 4Activate Phyrexian Altar by sacrificing the additional creature, adding one mana of any color.
5. 5Cast the creature from your graveyard by paying its mana cost. It will not enter with a finality counter on it due to Solemnity.
6. 6Repeat.

Effects

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