Ashaya, Soul of the Wild + Rootpath Purifier + Murasa Rootgrazer + Retreat to Coralhelm + Phyrexian Walker

Ashaya, Soul of the Wild

Rootpath Purifier

Murasa Rootgrazer

Retreat to Coralhelm

Phyrexian Walker

How it works

1. Activate Murasa Rootgrazer's second ability by tapping it, returning Phyrexian Walker to your hand from the battlefield.
2. Cast Phyrexian Walker by paying 0.
3. When Phyrexian Walker enters the battlefield, Retreat to Coralhelm triggers, untapping Murasa Rootgrazer.
4. Repeat.

This clever loop transforms free artifact creatures into an endless engine of landfall and storm triggers by leveraging Ashaya, Soul of the Wild to turn every nontoken creature into a land. Rootpath Purifier ensures those creatures-turned-lands also count as basic, allowing Murasa Rootgrazer to scoop them right back to your hand with its tap ability. Once Murasa Rootgrazer bounces a zero-mana artifact like Phyrexian Walker, you can recast it instantly for free. Every time Phyrexian Walker re-enters the battlefield, Retreat to Coralhelm triggers to untap Murasa Rootgrazer, letting you repeat the entire process as many times as you desire.