Witherbloom, the Balancer, Phyrexian Altar, and Lab Rats

Prerequisites

• Witherbloom, the Balancer on the battlefield
• Phyrexian Altar on the battlefield
• Lab Rats in hand
• available

Steps

1. Cast Lab Rats with buyback by paying due to its affinity for creatures, creating a creature token and returning Lab Rats to your hand
2. Activate Phyrexian Altar by sacrificing the creature token, adding
3. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite magecraft triggers
• Infinite sacrifice triggers
• Infinite storm count