Mortuary + Willow Geist + Phantom Train + Gwenom, Remorseless

Mortuary

Willow Geist

Phantom Train

Gwenom, Remorseless

How it works

1. Activate Phantom Train by sacrificing Willow Geist.
2. When Willow Geist dies, it and Mortuary triggers.
3. Resolve the Mortuary trigger, putting Willow Geist from your graveyard onto the top of your library.
4. Resolve the Willow Geist trigger, causing you to gain 1 life
5. Resolve the Phantom Train ability.
6. Cast Willow Geist from the top of your library by paying 1 life due to Gwenom.
7. Repeat.

This loop turns the graveyard into a reliable engine by letting you recast cheap threats indefinitely, heavily supported by Gwenom, Remorseless allowing you to play cards from the top of your library while paying life instead of mana. By activating Phantom Train to sacrifice Willow Geist, you trigger its death ability while Mortuary steps in to immediately catch it and place it right back on top of your library. As Willow Geist leaves the graveyard to return to the library, its other triggered ability adds a +1/+1 counter to itself, while its death trigger gains you life—completely offsetting the life you pay to recast it off the top with Gwenom, Remorseless.