Preston, the Vanisher + Karmic Guide + Cloudshift + Blasting Station

Preston, the Vanisher

Karmic Guide

Cloudshift

Blasting Station

How it works

1. Cast Cloudshift by paying , blinking Karmic Guide.
2. Karmic Guide enters the battlefield, triggering itself, Preston and Blasting Station.
3. Resolve the Karmic Guide trigger, returning any creature card from your graveyard to the battlefield.
4. Resolve the Blasting Station trigger, untapping it.
5. Activate Blasting Station by tapping it and sacrificing Karmic Guide, dealing 1 damage to any target.
6. Resolve the Preston trigger from step 2, creating a token copy of Karmic Guide that is a 0/1 white Illusion.
7. The Karmic Guide token enters the battlefield, triggering itself and Blasting Station.
8. Resolve the Karmic Guide token's trigger, returning the nontoken Karmic Guide from your graveyard to the battlefield.
9. Repeat from step 2.

This loop is a masterclass in recursive recycling, using Preston, the Vanisher to populate the battlefield with fragile duplicates whenever a non-cast creature arrives. By kicking things off with Cloudshift, Karmic Guide enters the battlefield uncast and immediately pulls another creature back from the graveyard while Preston creates a 0/1 Illusion copy of the Guide. That very same entry triggers Blasting Station, untapping it so you can sacrifice the original Karmic Guide for damage, which in turn lets the Illusion copy's own entry loop the original Karmic Guide right back out of the graveyard to do it all over again.