March of the Machines, and Mycosynth Lattice

Prerequisites

• March of the Machines on the battlefield
• Mycosynth Lattice on the battlefield

Steps

1. Mycosynth Lattice causes all permanents to become artifacts, and March of the Machines causes all noncreature artifacts to become artifact creatures with power and toughness each equal to their mana value
2. This causes all noncreature artifacts with mana value 0 or less, including lands, currently on the battlefield or that are put onto the battlefield to be put into their owner's graveyard as a state-based action due to having 0 toughness

Results

• Destroy all lands
• Destroy all noncreature permanents with mana value 0
• Destroy all lands that enter the battlefield
• Destroy all noncreature permanents with mana value 0 upon entering
• Lock
• Mass Land Denial