noun, noun or participle which takes 'suru', intransitive verb
Describes something changing its form or appearance in a mysterious or unpredictable way. Often used in the phrase 変幻自在 (freely changing; protean).
彼の変幻自在なプレースタイルは相手を惑わせる。
His protean playing style confuses opponents.
The clouds transformed and showed various shapes.