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

Prerequisites

• Animation Module on the battlefield
• Scion of the Swarm on the battlefield
• Ashnod's Altar on the battlefield
• Soul's Attendant 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's Attendant 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's Attendant triggers
6. Holding priority, activate Ashnod's Altar by sacrificing the Servo, adding
7. Resolve the Soul's Attendant 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