Nim Deathmantle, Phyrexian Altar, and Great Whale

Prerequisites

• Nim Deathmantle on the battlefield
• Phyrexian Altar on the battlefield
• Great Whale on the battlefield
• You control up to seven lands that can tap to produce at least

Steps

1. Activate up to seven lands by tapping them, adding at least
2. Activate Phyrexian Altar by sacrificing Great Whale, adding one mana of any color
3. When Great Whale dies, Nim Deathmantle triggers, returning Great Whale from your graveyard to the battlefield, and attaching Nim Deathmantle to it
4. When Great Whale enters the battlefield, it triggers, untapping up to seven lands
5. Repeat
6. If the lands can tap to produce at least , this combo nets infinite mana

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite untap of lands you control