Skittering Precursor + Sword of the Meek + Ruination Guide + Grinding Station

Skittering Precursor

Sword of the Meek

Ruination Guide

Grinding Station

How it works

1. Activate Grinding Station by tapping it and 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. When Sword of the Meek enters the battlefield, Grinding Station triggers, untapping Grinding Station.
5. Resolve the Grinding Station ability from step 1, causing target player to mill three cards.
6. Repeat.

This intricate loop relies on Grinding Station as the engine, which can sacrifice Sword of the Meek to mill an opponent while untapping itself whenever a new artifact enters the battlefield. Because Sword of the Meek has a power and toughness of 1/1, it naturally triggers its own recursive return from the graveyard whenever a 1/1 creature enters your control. The magic happens thanks to Ruination Guide, whose static ability grants your colorless creatures +1/+0, bumping the 0/1 Eldrazi Spawn tokens created by Skittering Precursor up to 1/1s the exact moment they enter the battlefield. This timing allows the newly birthed Spawn to satisfy Sword of the Meek's size requirement, letting the Sword attach itself to the token, which in turn triggers Grinding Station to untap and ready the loop all over again.