Artefakt

: Die Chimärenkugel ist bis zum Ende des Zuges eine fliegende 2/1 Artefaktkreatur.

: Die Chimärenkugel ist bis zum Ende des Zuges eine nichtfliegende 3/2 Artefaktkreatur.
If the first ability is activated and resolves, then the second ability is activated and resolves, Chimeric Sphere will be a 3/2 creature. It won’t have flying.
A noncreature permanent that turns into a creature can attack, and its
abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn’t matter how long the permanent has been a creature.