Siegehorn Ceratops, Animation Module, Ashnod's Altar, and Warstorm Surge

Prerequisites

• Siegehorn Ceratops on the battlefield
• Animation Module on the battlefield
• Ashnod's Altar on the battlefield
• Warstorm Surge on the battlefield
• You have a way to deal non-lethal damage to Siegehorn Ceratops
• available

Steps

1. Deal damage to Siegehorn Ceratops
2. Siegehorn Ceratops triggers, putting two +1/+1 counters on itself
3. Animation Module triggers, causing you to pay to create a 1/1 Servo artifact creature token
4. The Servo enters the battlefield, triggering Warstorm Surge
5. Holding priority, activate Ashnod's Altar by sacrificing the Servo, adding
6. Resolve the Warstorm Surge trigger, dealing 1 damage to Siegehorn Ceratops
7. Repeat from step 2

Results

• Infinite +1/+1 counters on Siegehorn Ceratops
• Infinite colorless mana
• Infinite creatue tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers