according to the text it should exile opponents first non land card when its loses menace. but after the first initial trigger for this ability it never gains menace back. but it will trigger each time @Oktagon_Support
Hello @Julie71 ,
Thank you for all the information provided, this issue will be investigated!
If you have any additional information that you consider relevant, please don’t hesitate to send me 
Rebeca.
if your need anything further let me know.
Still bugged!
Today at TKR, bottom node