Judith, the Scourge Diva + Skittering Precursor + Sword of the Meek + Phantom Train

Judith, the Scourge Diva

Skittering Precursor

Sword of the Meek

Phantom Train

How it works

1. Activate Phantom Train 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 Judith, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Eldrazi Spawn.
4. Resolve the Phantom Train ability
5. Repeat.

This fascinating loop relies on Phantom Train acting as an outlet to repeatedly sacrifice Sword of the Meek, which triggers Skittering Precursor to churn out an Eldrazi Spawn token. Because Judith, the Scourge Diva provides a passive +1/+0 buff to your team, that newly created 0/1 token enters the battlefield as a 1/1 creature, which in turn satisfies the condition to recur Sword of the Meek directly from your graveyard and attach it to the spawn. As you feed the engine by sacrificing the sword over and over, you generate infinite colorless mana from the spawn tokens, grow Phantom Train with endless +1/+1 counters, and unleash infinite death triggers and damage.