Ulasht, the Hate Seed, Mazirek, Kraul Death Priest, and Phyrexian Altar

Prerequisites

• Ulasht, the Hate Seed on the battlefield
• Mazirek, Kraul Death Priest on the battlefield
• Phyrexian Altar on the battlefield
• Ulasht has at least two +1/+1 counters on it
• available

Steps

1. Activate Ulasht by paying and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token
2. Activate Phyrexian Altar by sacrificing the Saproling, adding
3. Mazirek triggers, putting a +1/+1 counter on each creature you control
4. Repeat

Results

• Infinite +1/+1 creatures on all creatures you control except Ulasht
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers