Patchwork Crawler + Trench Behemoth + PuPu UFO

Prerequisites

• You have at least one land card in hand.

Steps

1. 1Activate Patchwork Crawler using PuPu UFO's ability by tapping it, putting a land from your hand onto the battlefield.
2. 2If the land is mana-producing and enters the battlefield untapped, you may activate it by tapping it, adding at least .
3. 3Activate Patchwork Crawler using Trench Behemoth's ability by returning the land from the battlefield to your hand, untapping Patchwork Crawler.
4. 4Repeat.

Effects

• Infinite landfall triggers
• Infinite mana lands you control that enter the battlefield untapped can produce