Mortuary + Experimental Frenzy + Stonecoil Serpent

Mortuary

Experimental Frenzy

Stonecoil Serpent

How it works

1. Cast Stonecoil Serpent from the top of your library by paying 0.
2. Stonecoil Serpent enters the battlefield and dies as a state-based action due to having zero toughness.
3. Mortuary triggers, putting Stonecoil Serpent on top of your library from your graveyard.
4. Repeat.

This clever loop turns the zero-mana casting cost of Stonecoil Serpent into a perpetual motion machine by bypassing your hand entirely. With Experimental Frenzy granting you the ability to cast spells directly from the top of your library, you can repeatedly deploy the Serpent for zero mana, where it instantly heads to the graveyard due to having zero toughness. That trip to the graveyard triggers Mortuary, which immediately places the Serpent right back on top of your library, ready for Experimental Frenzy to let you cast it all over again.