Animation Module, Scion of the Swarm, Ashnod's Altar, and Soul Warden

Prerequisites

• Animation Module on the battlefield
• Scion of the Swarm on the battlefield
• Ashnod's Altar on the battlefield
• Soul Warden on the battlefield
• You have a way to cause a creature to enter the battlefield under your control
• available

Steps

1. Cause a creature to enter the battlefield under your control
2. Soul Warden triggers, causing you to gain 1 life
3. Scion of the Swarm triggers, putting a +1/+1 counter on itself
4. Animation Module triggers, causing you to pay to create a 1/1 Servo artifact creature token
5. When the Servo enters the battlefield, Soul Warden triggers
6. Holding priority, activate Ashnod's Altar by sacrificing the Servo, adding
7. Resolve the Soul Warden trigger, causing you to gain 1 life
8. Repeat from step 3

Results

• Infinite +1/+1 counters on Scion of the Swarm
• Infinite colorless mana
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite sacrifice triggers