Infantry Shield, Phyrexian Altar, and Hellkite Charger

Prerequisites

• Infantry Shield on the battlefield
• Phyrexian Altar on the battlefield
• Hellkite Charger on the battlefield

Steps

1. Declare the creature that has Infantry Shield attached and Hellkite Charger as attackers, triggering the creature and Hellkite Charger
2. Resolve the creature's trigger, creating a number of 1/1 Warrior creature tokens that are tapped and attacking equal to the creature's power
3. Holding priority, activate Phyrexian Altar seven times by sacrificing seven Warriors, adding
4. Resolve the Hellkite Charger trigger, causing you to pay to untap all attacking creatures you control and to get an additional combat phase after this one
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite combat phases
• Infinite creature tokens