Requires

Goblin Sharpshooter must be on the battlefield. Twinflame must be in hand. Elemental Mastery must be on the battlefield. Elemental Mastery attached to Goblin Sharpshooter. Goblin Sharpshooter does not have summoning sickness. Mana needed:

Steps

1. Cast Twinflame 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