Gishath, Sun's Avatar, Mortuary, Aggravated Assault, and Phyrexian Altar

Prerequisites

• Gishath, Sun's Avatar on the battlefield
• Mortuary on the battlefield
• Aggravated Assault on the battlefield
• Phyrexian Altar on the battlefield
• You control at least five other nontoken Dinosaurs
• An opponent cannot block Gishath

Steps

1. Deal combat damage to an opponent using Gishath
2. Gishath triggers, causing you to reveal the top seven cards of your library and put all Dinosaurs revealed this way onto the battlefield
3. Move to your postcombat main phase
4. Activate Phyrexian Altar five times by sacrificing five other nontoken Dinosaurs, adding
5. When the Dinosaurs die, Mortuary triggers that many times, putting the Dinosaurs on top of your library from your graveyard
6. Activate Aggravated Assault by paying , causing you to untap all creatures you control and to get an additional combat and main phase after this one
7. Repeat

Results

• Infinite combat damage
• Infinite combat phases
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures you control