Gandalf the White + Ancestral Statue + Clock of Omens + Everflowing Chalice

Gandalf the White

Ancestral Statue

Clock of Omens

Everflowing Chalice

How it works

1. Activate Everflowing Chalice by tapping it, adding at least CCCC.
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 Everflowing Chalice.
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 Everflowing Chalice minus four, this combo nets infinite colorless mana.