Mortuary + Krark-Clan Ironworks + Vizier of the Menagerie

Mortuary

Krark-Clan Ironworks

Vizier of the Menagerie

How it works

1. Activate Krark-Clan Ironworks by sacrificing the nontoken creature, adding CC.
2. When the creature dies, Mortuary triggers, putting the creature from your graveyard onto the top of your library.
3. Cast the creature by paying its mana cost.
4. Repeat.

This elegant loop turns a single creature into an engine for infinite mana and triggers by exploiting the top of your library as a hidden hand. You sacrifice your creature to Krark-Clan Ironworks for a pair of colorless mana, which immediately triggers Mortuary to place that exact creature right back onto the top of your library. Thanks to Vizier of the Menagerie, you can peer at that top card at any time and cast it directly from your library—using the very colorless mana you just generated, since the Vizier allows you to spend mana as though it were any color to cast creature spells.