The Red Terror + Animation Module + Terror of the Peaks + Phyrexian Altar

The Red Terror

Animation Module

Terror of the Peaks

Phyrexian Altar

How it works

1. Cause a creature to enter the battlefield under your control.
2. Terror of the Peaks triggers, dealing damage to an opponent equal to the creature's power.
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 the battlefield, Terror of the Peaks triggers.
6. Holding priority, activate Phyrexian Altar by sacrificing the Servo, adding 1.
7. Resolve the Terror of the Peaks trigger, dealing 1 damage to an opponent.
8. Repeat from step 3.

This brilliant loop transforms a single creature entering the battlefield into an unstoppable cascade of damage and life-draining wrath. As Terror of the Peaks reacts to the new arrival by dealing damage, The Red Terror greedily watches that red source deal damage and grows larger with a +1/+1 counter, which in turn awakens Animation Module to forge a fresh 1/1 Servo artifact creature token for just one mana. You can easily feed that Servo right into Phyrexian Altar to generate the exact {1} mana needed to pay Animation Module's trigger, keeping the engine humming forever while Terror of the Peaks mercilessly blasts your opponents to ash with endless damage triggers.