Sydri, Galvanic Genius, Mycosynth Lattice, and Dross Scorpion

Prerequisites

• Sydri, Galvanic Genius on the battlefield
• Mycosynth Lattice on the battlefield
• Dross Scorpion on the battlefield
• You control a land that can produce

Steps

1. Activate your land to add
2. Activate Sydri by paying , targeting a land an opponent controls
3. The land dies due to having zero toughness
4. Dross Scorpion triggers, untapping your land
5. Repeat

Results

• Destroy all lands opponents control