Basri's Lieutenant + Cathars' Crusade + Blasting Station

Basri's Lieutenant

Cathars' Crusade

Blasting Station

How it works

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