Ancestral Statue + Clock of Omens + Panharmonicon + Chromatic Orrery

Ancestral Statue
Clock of Omens
Panharmonicon
Chromatic Orrery

Requires
Ancestral Statue in hand. All other permanents on the battlefield. You control a nontoken noncreature artifact with mana value one or less.
Steps
  1. Activate Chromatic Orrery's first ability by tapping it, adding at least 5
  2. Cast Ancestral Statue by paying 4
  3. When Ancestral Statue enters the battlefield, it triggers twice
  4. Holding priority, activate Clock of Omens by tapping the nontoken noncreature artifact with mana value one or less and by tapping Ancestral Statue, untapping Chromatic Orrery
  5. Resolve both Ancestral Statue triggers, returning it and the nontoken noncreature artifact to your hand
  6. Cast the noncreature artifact by paying its mana cost
  7. Repeat
  8. If the noncreature artifact has a mana value of zero, this combo nets infinite mana, which would allow you to instead use Chromatic Orrery's second ability to draw infinite cards
Results
Infinite colored mana. Infinite colorless mana. Infinite ETB. Infinite LTB. Infinite storm count. Infinite card draw. Infinite draw triggers.