Orthion, Hero of Lavabrink, Priest of Urabrask, Thornbite Staff, and Phyrexian Altar

Prerequisites

• Orthion, Hero of Lavabrink on the battlefield
• Priest of Urabrask on the battlefield
• Thornbite Staff on the battlefield
• Phyrexian Altar on the battlefield
• Orthion does not have summoning sickness
• available

Steps

1. Activate Orthion's first ability by paying and tapping it, creating a token copy of Priest of Urabrask with haste
2. When the token Priest of Urabrask enters the battlefield, it triggers, adding
3. Activate Phyrexian Altar by sacrificing the Priest of Urabrask token, adding one mana of any color
4. When the Priest of Urabrask token dies, Orthion triggers, untapping itself
5. Repeat
6. Once you have infinite colored mana, you may instead use Orthion's second ability to make copies of any creature(s) you control

Results

• Infinite colored mana
• Infinite copies of creatures you control
• Infinite creature tokens with haste
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers