Arahbo, the First Fang + Whitemane Lion + Phyrexian Altar + Primal Vigor

Arahbo, the First Fang

Whitemane Lion

Phyrexian Altar

Primal Vigor

How it works

1. Cast Whitemane Lion by paying 1.
2. When Whitemane Lion enters the battlefield, it and Arahbo trigger.
3. Resolve the Whitemane Lion trigger, returning it from the battlefield to your hand.
4. Resolve the Arahbo trigger, creating two 1/1 Cat creature tokens.
5. Activate Phyrexian Altar twice by sacrificing the Cats, adding 1.
6. Repeat.