Remembrance + Mortuary + Kobolds of Kher Keep + Phantom Train

Remembrance

Mortuary

Kobolds of Kher Keep

Phantom Train

How it works

1. Activate Phantom Train by sacrificing Kobolds of Kher Keep.
2. When Kobolds of Kher Keep dies, Mortuary and Remembrance trigger.
3. Resolve the Mortuary trigger, putting Kobolds of Kher Keep from your graveyard on top of your library.
4. Resolve the Remembrance trigger, searching your library for Kobolds of Kher Keep and putting it into your hand.
5. Resolve the Phantom Train ability.
6. Cast Kobolds of Kher Keep by paying 0.
7. Repeat.

This loop relies on the brilliant interaction between Remembrance and Mortuary whenever a creature hits your graveyard, turning a zero-mana investment into an endless engine. By sacrificing Kobolds of Kher Keep to fuel Phantom Train's activation cost, you send the little minion to the graveyard where both triggered abilities see its demise. Mortuary places the Kobolds right back on top of your library just in time for Remembrance to search them out and slide them straight into your hand, leaving you free to recast them for zero mana and repeat the entire sequence indefinitely.