Tawnos, Solemn Survivor + Krark-Clan Ironworks + Sparring Mummy

Tawnos, Solemn Survivor

Krark-Clan Ironworks

Sparring Mummy

How it works

1. Activate Tawnos's second ability by paying 1, tapping it and sacrificing two artifact tokens, exiling Sparring Mummy from your graveyard and creating a token copy of it that is an artifact in addition to its other types.
2. When the Sparring Mummy token enters, it triggers, untapping Tawnos.
3. Activate Tawnos's first ability by paying 2 and tapping it, creating a copy of the Sparring Mummy token and causing you to mill two cards.
4. When the Sparring Mummy token enters, it triggers, untapping Tawnos.
5. Activate Krark-Clan Ironworks by sacrificing a Sparring Mummy token, adding CC.
6. Repeat from step 3.

This loop brilliantly leverages Tawnos, Solemn Survivor to continually rebuild and leverage your graveyard treasures; by exiling Sparring Mummy to Tawnos's second ability, you plant the seed for an artifact creature copy that can subsequently be replicated using Tawnos's first ability. Each time a Sparring Mummy token enters the battlefield, its triggered ability untaps Tawnos so you can keep copying it, while Krark-Clan Ironworks sits on the board to turn your surplus token copies into a steady stream of colorless mana.