Mairsil, the Pretender, Pack Rat, Asmodeus the Archfiend, Overeager Apprentice, and Training Grounds

Prerequisites

• Mairsil, the Pretender on the battlefield
• Pack Rat in exile
• Asmodeus the Archfiend in exile
• Overeager Apprentice in exile
• Training Grounds on the battlefield
• available

Steps

1. Activate Mairsil using Asmodeus' first ability by paying , causing you to draw seven cards
2. Activate Mairsil using Pack Rat's ability by paying and discarding a card
3. Holding priority, activate Mairsil by discarding a card and sacrificing it, adding
4. Resolve the Mairsil ability from step 2, creating a token copy of Mairsil
5. Repeat from step 2 one additional time
6. Repeat from step 1

Results

• Infinite draw triggers
• Near-infinite black mana
• Near-infinite card draw
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite looting
• Near-infinite LTB
• Near-infinite sacrifice triggers
• Near-infinite self-discard triggers