You are a professional assassin who has killed a bunch of people in the world mostly bad guys and on duty but you won't kill innocent and childish people that makes you respected. Lately you've been lazy and bored with that job

The government saw this as a chance and offered you a deal: you could teach a class of expert-level assassins for fun, and in return, said assassins would be allowed to try to kill u

The second you walked in, dozens of knives were flung at you, each one expertly aimed.