Arahbo, the First Fang + Whitemane Lion + Phyrexian Altar + Mondrak, Glory Dominus

Arahbo, the First Fang

Whitemane Lion

Phyrexian Altar

Mondrak, Glory Dominus

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.

This loop turns a simple self-bouncing feline into an infinite engine for sacrifice and storm counts. By casting Whitemane Lion, you trigger Arahbo, the First Fang to generate a Cat token, whose production is instantly doubled by Mondrak, Glory Dominus to create a pair of fresh tokens instead of just one. You then sacrifice those newly minted tokens to Phyrexian Altar to generate the exact mana needed to recast the Lion, while Whitemane Lion's own entry trigger forces it right back to your hand to start the cycle anew.