Lagrella, the Magpie + Karmic Guide + Preston, the Vanisher + Ephemerate

Lagrella, the Magpie

Karmic Guide

Preston, the Vanisher

Ephemerate

How it works

1. Cast Ephemerate by paying , blinking Lagrella.
2. When Lagrella enters the battlefield, it and Preston triggers.
3. Resolve the Lagrella trigger, exiling Karmic Guide until Lagrella leaves the battlefield.
4. Resolve the Preston trigger, creating a token copy of Lagrella that is a 0/1 Illusion.
5. Put the nontoken Lagrella into your graveyard due to the legend rule.
6. If Lagrella is your commander, choose not to return it to the command zone from your graveyard.
7. When Lagrella leaves the battlefield, Karmic Guide is returned to the battlefield from exile.
8. Karmic Guide, Lagrella and Preston each trigger.
9. Resolve the Preston trigger, creating a token copy of Karmic Guide that is a 0/1 Illusion.
10. When the Karmic Guide token enters the battlefield, it triggers, choosing to return nothing to the battlefield.
11. Resolve the Lagrella trigger, putting two +1/+1 counters on the nontoken Karmic Guide.
12. Resolve the Karmic Guide trigger from step 8, returning Lagrella from your graveyard to the battlefield.
13. Repeat from step 2.

This clever loop turns Lagrella, the Magpie and Karmic Guide into a recursive blinking engine, all while Preston, the Vanisher watches and scales your board with every cycle. Because Preston creates a 0/1 illusion token copy whenever a nontoken creature enters without being cast, every iteration of the loop spits out endless creature tokens, triggers, and counters. Ephemerate acts as the initial catalyst to get the ball rolling, instantly kicking off an unstoppable cascade of enter-the-battlefield and leave-the-battlefield triggers.