Ancestral Statue + Clock of Omens + Panharmonicon + Astral Cornucopia

Ancestral Statue
Clock of Omens
Panharmonicon
Astral Cornucopia

Requires
Ancestral Statue in hand. All other permanents on the battlefield. Astral Cornucopia has at least four charge counters on it. You control a nontoken noncreature artifact with mana value less than or equal to the number of charge counters on Astral Cornucopia minus four.
Steps
  1. Activate Astral Cornucopia by tapping it, adding at least 4
  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 and Ancestral Statue, untapping Astral Cornucopia
  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 less than the number of charge counters on Astral Cornucopia minus four, this combo nets infinite colored mana
Results
Infinite colored mana. Infinite ETB. Infinite LTB. Infinite storm count.