Goblin Sharpshooter, Heat Shimmer, and Elemental Mastery

Prerequisites

• Goblin Sharpshooter on the battlefield
• Heat Shimmer in hand
• Elemental Mastery on the battlefield
• Elemental Mastery attached to Goblin Sharpshooter
• Goblin Sharpshooter does not have summoning sickness
• available

Steps

1. Cast Heat Shimmer by paying , creating a token copy of Goblin Sharpshooter with haste
2. Activate the nontoken Goblin Sharpshooter by tapping it, creating a 1/1 Elemental creature token with haste
3. Activate the token Goblin Sharpshooter by tapping it, dealing 1 damage to the Elemental token
4. The Elemental dies as a state-based action due to having zero or less toughness
5. Both Goblin Sharpshooters trigger, untapping themselves
6. Repeat from step 2

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB