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

Cromat
Minn, Wily Illusionist
Fool's Demise
Phyrexian Altar

Requires
Cromat must be on the battlefield. Minn, Wily Illusionist must be on the battlefield. Fool's Demise must be on the battlefield. Phyrexian Altar must be on the battlefield. Fool's Demise attached to Cromat.
Steps
  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.
Results
Infinite colored mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.