Mazirek, Kraul Death Priest, Herd Baloth, and Ashnod's Altar

Prerequisites

• Mazirek, Kraul Death Priest on the battlefield
• Herd Baloth on the battlefield
• Ashnod's Altar on the battlefield
• You control at least one additional creature

Steps

1. Activate Ashnod's Altar by sacrificing another creature, adding
2. Mazirek triggers, putting a +1/+1 counter on each creature you control
3. Herd Baloth triggers, creating a 4/4 Beast creature token
4. Repeat

Results

• Infinite +1/+1 counters
• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers