Dross Scorpion, Elemental Mastery, Goblin Bombardment, and Encroaching Mycosynth

Prerequisites

• Dross Scorpion on the battlefield
• Elemental Mastery on the battlefield
• Goblin Bombardment on the battlefield
• Encroaching Mycosynth on the battlefield

Steps

1. Activate the creature with Elemental Mastery attached by tapping it, creating a number of 1/1 Elemental creature tokens with haste equal to its power
2. Activate Goblin Bombardment by sacrificing an Elemental
3. When the Elemental dies as an artifact due to Encroaching Mycosynth, Dross Scorpion triggers, untapping the creature with Elemental Mastery attached
4. Resolve the Goblin Bombardment ability
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite damage
• Infinite creature tokens with haste