Mortuary + Moldervine Reclamation + Stonecoil Serpent

Mortuary

Moldervine Reclamation

Stonecoil Serpent

How it works

1. Cast Stonecoil Serpent by paying 0.
2. Stonecoil Serpent enters and dies as a state-based action due to having 0 toughness, triggering Mortuary and Moldervine Reclamation.
3. Resolve the Mortuary trigger, putting Stonecoil Serpent from your graveyard onto the top of your library.
4. Resolve the Moldervine Reclamation trigger, causing you to draw a card, thus drawing Stonecoil Serpent from your library, and gain 1 life.
5. Repeat.

This elegant loop turns a casting cost of zero into a self-sustaining engine by exploiting Stonecoil Serpent's X-cost nature, which causes it to immediately perish upon entering the battlefield. That tragic zero-toughness demise triggers two crucial safety valves: Mortuary catches the serpent as it hits the graveyard and gently places it right back on top of your library, while Moldervine Reclamation immediately rewards that death by drawing you the card you just tucked away and padding your life total. By repeatedly casting, dying, recycling, and drawing the same tiny construct, you generate infinite death triggers, life, and storm count on demand.