Woodland Champion, Animation Module, and Ashnod's Altar

Prerequisites

• Woodland Champion on the battlefield
• Animation Module on the battlefield
• Ashnod's Altar on the battlefield
• You have a way to put a +1/+1 counter on a creature you control
• available

Steps

1. Put a +1/+1 counter on any creature you control
2. Animation Module triggers, causing you to pay to create a 1/1 Servo artifact creature token
3. The Servo enters the battlefield, triggering Woodland Champion
4. Holding priority, activate Ashnod's Altar by sacrificing the Servo, adding
5. Resolve the Woodland Champion trigger, putting a +1/+1 counter on it
6. Repeat from step 2

Results

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