Rowan, Scion of War, Phyrexian Altar, and Lab Rats

Prerequisites

• Rowan, Scion of War on the battlefield
• Phyrexian Altar on the battlefield
• Lab Rats in hand
• You have lost at least 4 life this turn
• Rowan does not have summoning sickness
• available

Steps

1. Activate Rowan by tapping it, reducing the cost of all black and/or red spells you cast this turn by at least
2. Cast Lab Rats with buyback by paying due to Rowan's ability, creating a 1/1 Rat creature token and returning Lab Rats to your hand
3. Activate Phyrexian Altar by sacrificing the Rat, adding
4. Repeat from step 2

Results

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