Urtet, Remnant of Memnarch, Equilibrium, Urza's Incubator, and Phyrexian Altar

Prerequisites

• Urtet, Remnant of Memnarch on the battlefield
• Equilibrium on the battlefield
• Urza's Incubator on the battlefield
• Phyrexian Altar on the battlefield
• "Myr" chosen with Urza's Incubator
• You have a Myr card in hand with mana value two or less that can be cast for due to Urza's Incubator
• You control a nontoken Myr with mana value two or less that can be cast for due to Urza's Incubator

Steps

1. Cast the Myr with mana value two or less in your hand by paying due to Urza's Incubator
2. Urtet and Equilibrium trigger
3. Resolve the Urtet trigger, creating a 1/1 Myr artifact creature token
4. Activate Phyrexian Altar by sacrificing the Myr token, adding
5. Resolve the Equilibrium trigger, causing you to pay to return the Myr with mana value two or less currently on the battlefield to your hand
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count