Basking Broodscale + Reluctant Role Model + Thunderous Velocipede

Basking Broodscale

Reluctant Role Model

Thunderous Velocipede

How it works

1. Cast Basking Broodscale by paying 1, which enters with a +1/+1 counter on it due to Thunderous Velocipede.
2. Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token that enters with a +1/+1 counter on it due to Thunderous Velocipede.
3. Activate the Eldrazi Spawn by sacrificing it, adding C.
4. When the Eldrazi Spawn dies, Reluctant Role Model's second ability triggers, putting a +1/+1 counter on Basking Broodscale.
5. Repeat from step 2.