Thopter Squadron + Ashnod's Altar + Kaya, Geist Hunter

Thopter Squadron

Ashnod's Altar

Kaya, Geist Hunter

How it works

1. Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.
2. Activate Thopter Squadron's first ability by paying 1 and removing a +1/+1 counter from it, creating two 1/1 Thopter artifact creature tokens.
3. Activate Ashnod's Altar by sacrificing a Thopter, adding CC.
4. Activate Thopter Squadron's second ability by paying 1 and sacrificing the Thopter, putting a +1/+1 counter on it.
5. Repeat from step 2