Gishath, Sun's Avatar, Mortuary, Hellkite Charger, and Phyrexian Altar

Prerequisites

• Gishath, Sun's Avatar on the battlefield
• Mortuary on the battlefield
• Hellkite Charger on the battlefield
• Phyrexian Altar on the battlefield
• You control at least seven other nontoken Dinosaurs
• An opponent cannot block Gishath or Hellkite Charger

Steps

1. Declare Gishath and Hellkite Charger as attackers, triggering Hellkite Charger's ability
2. Holding priority, activate Phyrexian Altar seven times by sacrificing seven other nontoken Dinosaurs, adding
3. When the Dinosaurs die, Mortuary triggers that many times, putting the Dinosaurs on top of your library from your graveyard
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. Deal combat damage to an opponent using Gishath
6. Gishath triggers, causing you to reveal the top seven cards of your library and put all Dinosaurs revealed this way onto the battlefield
7. Repeat each combat phase

Results

• Infinite combat damage
• Infinite combat phases
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers