So, given that the paladin (Reynauldo?) is falling from a height enough greater* than 578 feet, so that he doesn’t just go splat in the first round (d=at^2/2), allowing time for Candor to cast a Ceremony Cantrip…
And given that Candor knows the Ceremony Cantrip** …
And given that the GM has allowed an alternate version of Ceremony that will allow it to be used for a non-standard ritual other than those listed in the UA and XGtE…
Then Reynauldo might succeed in becoming a half dragon. Which has no fly speed. Just before he goes splat. Of course, if he has enough hit points, he can survive going splat…

*If the Ceremony takes one hour to cast, as in the current version, then we’re looking at a height that’s great enough that I would need to worry about the reduced effect of gravity up there beyond the atmosphere to try calculating it.
**Ironically, under the RAW, Reynauldo is more likely to know Ceremony, the first-level-spell, than Candor is. ^_^