Arahbo, the First Fang + Whitemane Lion + Phyrexian Altar + Exalted Sunborn

Arahbo, the First Fang

Whitemane Lion

Phyrexian Altar

Exalted Sunborn

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 elegant loop turns a simple self-bouncing Cat into an infinite engine by leveraging the passive amplification of Exalted Sunborn. When you cast Whitemane Lion, its entry triggers its own return to your hand while also setting off Arahbo, the First Fang to generate Cat tokens. Because Exalted Sunborn doubles any tokens you would create, Arahbo's trigger yields a pair of tokens instead of just one, which you can then feed directly into Phyrexian Altar to easily pay the mana required to recast the Lion.