Mad Scientist Scooter

Haste, Menace, Madness {1}{r}
Whenever Mad Scientist Scooter deals combat damage to a player, you may discard a card. If you do, create a 1/1 red Test Subject creature token.
Sacrifice three Test Subjects: Deal 3 damage to target creature or player.
The Master Plan is coming together. We're gonna get Anna this time!