Hexhaven Invigorator, and Akoum Hellkite

Prerequisites

• Hexhaven Invigorator on the battlefield
• Akoum Hellkite on the battlefield

Steps

1. Give Hexhaven Invigorator indestructible
2. Cause a land to enter under your control
3. When the land enters, Akoum Hellkite triggers, dealing damage to Hexhaven Invigorator
4. Hexhaven Invigorator triggers, searching your library for a land card and putting it onto the battlefield tapped
5. Repeat from step 3

Results

• Near-infinite landfall triggers
• Put all lands from your library onto the battlefield tapped