Mortuary + Memnite + Phantom Train + Gwenom, Remorseless

Mortuary

Memnite

Phantom Train

Gwenom, Remorseless

How it works

1. Activate Phantom Train by sacrificing Memnite
2. When Memnite dies, Mortuary triggers, putting Memnite from your graveyard onto the top of your library.
3. Resolve the Phantom Train ability.
4. Cast Memnite from the top of your library by paying 0 life.
5. Repeat.

This clever loop relies on the interaction between Phantom Train and Mortuary to continuously recycle cheap artifacts. By using Phantom Train's activated ability to sacrifice Memnite, you trigger Mortuary to place Memnite right back on top of your library instead of letting it stay in the graveyard. Once Gwenom, Remorseless is attacking, her ability allows you to cast Memnite directly from the top of your library for zero mana and zero life, feeding the loop indefinitely while growing your Phantom Train with endless +1/+1 counters.