Sword of the Meek + Animation Module + Ashnod's Altar + Bartolomé del Presidio

Sword of the Meek

Animation Module

Ashnod's Altar

Bartolomé del Presidio

How it works

1. Activate Bartolomé del Presidio by sacrificing Sword of the Meek, putting a +1/+1 counter on it.
2. Animation Module triggers, causing you to pay 1 to create a 1/1 Servo artifact creature token.
3. When the Servo enters, Sword of the Meek triggers, returning itself from your graveyard to the battlefield attached to the Servo.
4. Activate Ashnod's Altar by sacrificing the Servo, adding CC.
5. Repeat.

This crafty loop starts by using Ashnod's Altar to fuel the engine, allowing Bartolomé del Presidio to sacrifice Sword of the Meek for two colorless mana and a +1/+1 counter. That counter instantly wakes up Animation Module, which lets you pay one of that floating mana to spawn a fresh 1/1 Servo artifact creature token. As the Servo enters, Sword of the Meek triggers from your graveyard to attach itself right back to the new token, setting up the exact same sacrifice right into Ashnod's Altar all over again. By cycling the sword and the servo back and forth this way, you generate an endless stream of sacrifice triggers, death triggers, and colorless mana while making Bartolomé del Presidio infinitely large.