The Red Terror + Animation Module + Phyrexian Altar + Agate Instigator

The Red Terror

Animation Module

Phyrexian Altar

Agate Instigator

How it works

1. Cause a creature to enter the battlefield under your control.
2. Agate Instigator triggers, dealing 1 damage to each opponent.
3. The Red Terror triggers, putting a +1/+1 counter on itself.
4. Animation Module triggers, causing you to pay 1 to create a 1/1 Servo artifact creature token.
5. When the Servo enters, Agate Instigator triggers.
6. Holding priority, activate Phyrexian Altar by sacrificing the Servo, adding 1.
7. Resolve the Agate Instigator triggers, dealing 1 damage to each opponent.
8. Repeat from step 3.