Prerequisites
- Rex, Cyber-Hound on the battlefield
- Trench Behemoth in exile
- Llanowar Scout in exile
- You have at least one land card in hand
- Rex does not have summoning sickness
- Trench Behemoth and Llanowar Scout exiled with brain counters on them
Steps
- Activate Rex using Llanowar Scout's ability by tapping it, putting a land from your hand onto the battlefield
- If the land is mana-producing and enters the battlefield untapped, you may activate it by tapping it, adding at least
- Activate Rex using Trench Behemoth's ability by returning the land from the battlefield to your hand, untapping Rex
- Repeat
Results
- Infinite landfall triggers
- Infinite mana lands you control that enter the battlefield untapped can produce
Required Cards 3
Rex, Cyber-Hound
Legendary Artifact Creature — Robot Dog
Trench Behemoth
Creature — Kraken
Llanowar Scout
Creature — Elf Scout