Palinchron + Flameshadow Conjuring

Prerequisites

You control up to seven lands that can tap to produce {4}{U}{U}{R}.

Steps

1. Cast Palinchron for {5}{U}{U}.
2. Palinchron enters the battlefield, triggering itself and Flameshadow Conjuring.
3. Resolve the Palinchron trigger, untapping up to seven lands that can tap to produce at least {4}{U}{U}{R}.
4. Activate the seven lands by tapping them, adding at least {4}{U}{U}{R}.
5. Resolve the Flameshadow Conjuring trigger, paying {R} to create a copy of Palinchron.
6. The Palinchron copy enters the battlefield, untapping up to seven lands that can tap to produce at least {4}{U}{U}{R}.
7. Activate the seven lands by tapping them, adding at least {4}{U}{U}{R}.
8. Activate the non-token Palinchron by paying {2}{U}{U}, returning it to your hand.
9. Repeat.