Sidisi, Regent of the Mire + Karmic Guide + Sparring Mummy + Phantom Train

Sidisi, Regent of the Mire

Karmic Guide

Sparring Mummy

Phantom Train

How it works

1. Activate Sidisi by tapping it and sacrificing Sparring Mummy, returning Karmic Guide from your graveyard to the battlefield.
2. When Karmic Guide enters the battlefield, it triggers, returning Sparring Mummy from your graveyard to the battlefield.
3. When Sparring Mummy enters the battlefield, it triggers, untapping Sidisi.
4. Activate Phantom Train by sacrificing Karmic Guide.
5. Repeat.

This cunning loop lets you squeeze infinite value out of a cyclical graveyard exchange, powered by Sidisi, Regent of the Mire carefully scaling your sacrificed creatures up to larger threats. You use Sidisi's tap ability to sacrifice Sparring Mummy, bringing back Karmic Guide from the graveyard, whose own entry trigger pulls the Mummy right back out. Meanwhile, Sparring Mummy's entry trigger untaps Sidisi to keep the engine running, while Phantom Train steps in to neatly sacrifice Karmic Guide so the process can begin anew.