Basri's Lieutenant + Securitron Squadron + Blasting Station

Basri's Lieutenant

Securitron Squadron

Blasting Station

How it works

1. Activate Blasting Station by tapping it and sacrificing a creature with at least one +1/+1 counter.
2. Basri's Lieutenant triggers, creating a 2/2 Knight creature token.
3. When the Knight token enters the battlefield, Securitron Squadron and Blasting Station trigger.
4. Resolve the Securitron Squadron trigger, putting a +1/+1 counter on the Knight.
5. Resolve the Blasting Station trigger, untapping it.
6. Resolve the Blasting Station ability from step 1, dealing 1 damage to any target.
7. Repeat.