Kentaro, the Smiling Cat + Whitemane Lion + Urza's Incubator + Maskwood Nexus

Kentaro, the Smiling Cat

Whitemane Lion

Urza's Incubator

Maskwood Nexus

How it works

1. Cast Whitemane Lion by paying 0.
2. When Whitemane Lion enters the battlefield, it triggers, returning itself from the battlefield to your hand.
3. Repeat.

This clever loop relies on Maskwood Nexus to turn your entire deck into honorary Samurai, allowing Kentaro, the Smiling Cat to let you cast them for free. To grease the wheels, Urza's Incubator reduces the cost of those creature spells, letting Kentaro's alternative cost payment handle the rest. Once the board is primed, you simply cast Whitemane Lion for zero mana, use its own entry trigger to bounce itself back to your hand, and repeat the cycle to generate infinite entry and leave-the-battlefield triggers alongside an astronomical storm count.