Archelos, Lagoon Mystic + Gretchen Titchwillow + Training Grounds + Simic Growth Chamber

Prerequisites

• Archelos is untapped.

Steps

1. 1Play Simic Growth Chamber.
2. 2Simic Growth Chamber enters the battlefield untapped due to Archelos, triggering itself.
3. 3Holding priority, activate Simic Growth Chamber by tapping it, adding .
4. 4Resolve the Simic Growth Chamber trigger from step 2, returning itself to your hand from the battlefield.
5. 5Activate Gretchen Titchwillow by paying , causing you to draw a card and put Simic Growth Chamber from your hand onto the battlefield.
6. 6Repeat from step 2.

Effects

• Infinite card draw
• Infinite draw triggers
• Near-infinite landfall triggers