adjective
protean
PROH-tee-un/ˈprəʊtiən/
Able to change form, character, or style readily.
The protean octopus readily changes shape and color across different surroundings.

Etymology
Proteus could change his form at will. A word meaning “pertaining to Proteus” therefore came to describe anything readily changing its shape or character.
In context
It's a fascinating, myriad, amorphous, protean entity.
More examples
- His protean personality makes him hard to predict.
- The band's protean sound changes from one album to the next.
- The artist molds the protean material into one shape after another.
Forms
protean