v12p9 ~44%
The little dragon and its rider floated into the air, and rained rainbow light over them.
The actor in the second half sentence is off, as in <someone> rained the rainbow light. Changing the order to
The little dragon and its rider floated into the air, and rainbow light rained over them.
keeps things open (it's Megades' action).
~63%
He had read the bird in a book […]
Should probably be
He had read about the bird in a book […]