Myrkul, Lord of Bones, Verdant Succession, Riftsweeper, and Phyrexian Altar

Prerequisites

• Myrkul, Lord of Bones on the battlefield
• Verdant Succession on the battlefield
• Riftsweeper on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Riftsweeper, adding one mana of any color
2. Riftsweeper dies, triggering Verdant Succession and Myrkul
3. Resolve the Myrkul trigger, causing you to exile Riftsweeper and create a token copy of Riftsweeper that is an enchantment and loses all other card types
4. The Riftsweeper token enters the battlefield, shuffling the nontoken Riftsweeper into your library from exile
5. Resolve the Verdant Succession trigger from step 2, searching your library for Riftsweeper and putting it onto the battlefield
6. Riftsweeper enters the battlefield, shuffling any exiled card into its owner's library
7. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers