Cromat + Minn, Wily Illusionist + Fool's Demise + Phyrexian Altar

Cromat

Minn, Wily Illusionist

Fool's Demise

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Cromat, adding one mana of any color.
2. Cromat dies, triggering Minn's second ability and Fool's Demise's first and second abilities.
3. Resolve the second Fool's Demise trigger, returning it from your graveyard to your hand.
4. Resolve the first Fool's Demise trigger, returning Cromat from your graveyard to the battlefield.
5. Resolve the Minn trigger, putting Fool's Demise from your hand onto the battlefield attached to Cromat.
6. Repeat.