Marneus Calgar, Ashnod's Altar, and Rings of Brighthearth

Prerequisites

• Marneus Calgar on the battlefield
• Ashnod's Altar on the battlefield
• Rings of Brighthearth on the battlefield
• available

Steps

1. Activate Marneus by paying
2. Rings of Brighthearth triggers, causing you to pay to copy Marneus' ability
3. Resolve the copy of Marneus' ability, creating two 2/2 Astartes Warrior creature tokens
4. The tokens enter the battlefield, triggering Marneus, causing you to draw a card
5. Resolve the original Marneus ability from step 1, creating two 2/2 Astartes Warrior creature tokens
6. The tokens enter the battlefield, triggering Marneus, causing you to draw a card
7. Activate Ashnod's Altar four times by sacrificing four Astartes Warriors, adding eight
8. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite sacrifice triggers