Dance of the Dead + Worldgorger Dragon

Dance of the Dead
Worldgorger Dragon

Requires
Dance of the Dead must be in hand. Worldgorger Dragon must be in the graveyard. Mana needed: 1b
Steps
  1. Cast Dance of the Dead by paying 1b.
  2. Animate Dead enters the battlefield, returning Worldgorger Dragon from your graveyard to the battlefield attached with Dance of the Dead.
  3. Worldgorger Dragon enters the battlefield, exiling all other permanents you control.
  4. Dance of the Dead triggers, sacrificing Worldgorger Dragon.
  5. Worldgorger Dragon leaves the battlefield, returning all permanents exiled by it to the battlefield.
  6. Dance of the Dead enters the battlefield, returning Worldgorger Dragon from your graveyard to the battlefield attached with Dance of the Dead.
  7. Holding priority, activate all lands you control by tapping those, adding manas of any colors those lands can produce.
  8. Repeat.
Results
Infinite colored mana. Infinite colorless mana. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.