Lagrella, the Magpie, Karmic Guide, Preston, the Vanisher, and Cloudshift

Prerequisites

• Lagrella, the Magpie on the battlefield
• Karmic Guide on the battlefield
• Preston, the Vanisher on the battlefield
• Cloudshift in hand
• available

Steps

1. Cast Cloudshift 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

Results

• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB