Skittering Precursor + Sword of the Meek + Nahiri's Resolve + Megatog

Skittering Precursor

Sword of the Meek

Nahiri's Resolve

Megatog

How it works

1. Activate Megatog 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 Nahiri's Resolve, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Eldrazi Spawn.
4. Resolve the Megatog ability, giving it +3/+3 until end of turn.
5. Repeat.

This loop relies on Megatog's ability to repeatedly sacrifice Sword of the Meek, which naturally sends the Equipment right back to the graveyard. Each time you feed an artifact to Megatog, Skittering Precursor triggers to spawn a 0/1 colorless Eldrazi Spawn. Thanks to the static pump from Nahiri's Resolve, that Eldrazi Spawn enters the battlefield as a 1/1, which immediately satisfies Sword of the Meek's trigger condition to return itself from the graveyard and attach to the token. You can then sacrifice that same Sword of the Meek to Megatog again—and you can even cash in the Eldrazi Spawn's own sacrifice ability along the way for infinite colorless mana—pumping your Megatog to astronomical proportions while generating an endless storm of leave-the-battlefield, entry, and death triggers.