Note that a feature applying while motionless doesn’t mean it is motionless. And based on the rules, no, there are no other ways to notice the monster if it is motionless. Motion is the only way to spot a mimic, because if it’s not moving, you can’t distinguish it.
Look at the comment above mine. THAT was an um actually. OP described a perception check for a mimic, the comment I replied to said “um actually, there wouldn’t be a perception check”, and I replied with why there would be. Why are you making me the villain for defending the post?
Note that a feature applying while motionless doesn’t mean it is motionless. And based on the rules, no, there are no other ways to notice the monster if it is motionless. Motion is the only way to spot a mimic, because if it’s not moving, you can’t distinguish it.
Look at the comment above mine. THAT was an um actually. OP described a perception check for a mimic, the comment I replied to said “um actually, there wouldn’t be a perception check”, and I replied with why there would be. Why are you making me the villain for defending the post?