Skittering Precursor + Sword of the Meek + Ruination Guide + Extruder

Skittering Precursor

Sword of the Meek

Ruination Guide

Extruder

How it works

1. Activate Extruder by sacrificing Sword of the Meek.
2. Skittering Precursor triggers, creating a 0/1 Eldrazi Spawn creature token.
3. When the Eldrazi Spawn enters the battlefield as a 1/1 due to Ruination Guide, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Eldrazi Spawn.
4. Resolve the Extruder ability, putting a +1/+1 counter on a creature you control.
5. Repeat.

This clever loop turns Extruder's artifact-sacrificing cost into a perpetual engine by feeding it Sword of the Meek, which immediately slips back into your graveyard whenever it hits the bin. Every time you sacrifice the sword, Skittering Precursor triggers to spawn an Eldrazi Spawn, and thanks to Ruination Guide pumping that token's power to 1, Sword of the Meek's resurrection condition is effortlessly met to bring itself right back to the battlefield. Meanwhile, Ruination Guide also boosts your team while Extruder distributes an endless stream of +1/+1 counters, leaving you with an overwhelming army of creatures and infinite sacrifices to close out the game.