You need to keep running the lowest difficulty until you fight him enough times if you didnt see him when doing general completion
Wow sometimes he would pop up twice in same run for me.
Geeze ok that's crazy. Thanks!
He popped up 4 times for me
RANDOM. could be after any number of the 3 different sections along the way to boss.
Not sure I’ve heard of anyone getting ambush all 3 times in a single run, but definitely any of (none/1/2) are plentifully happening.
I just complete it once and then rerun the no defender path until I encounter him 4 times
I got 7* rhino 3 times. zemid handled him.
So silly, has anyone ever seen a Rhino in real life, there is not way an animal that size can ambush you ...
RNG in action