"Infinite" combo

You need to control Doubling Season, Wheel of Sun and Moon, and cast a Jace, Architect of Thought.
Jace enters with 8 loyalty
Ultimate Jace, it's put in the "graveyard"
Wheel of Sun and Moon puts it on the bottom of your library instead
Jace ultimate ability resolves, you get back your bottomed Jace and an opponent's spell
Jace, AoT enters with 8 loyalty
repeat