1. Invisible Illiger:

It happens not allways, but they can be heard and incoming arrows can be seen.

(1st invisible contact ended deadly for me)

2. after dying, i went for my dropped items,

(1st encounter: under water, wasn't able to get all stuff because of going up and spreading)

(2nd time: i went to same spot and was able to get all the stuff by running around)

Picture desription:

1st Picture: The Ravager without the rider went for me

2nd Picture: after dying the 2nd Ravager was invisible but audible and Illiger didn't ignored me till some were left or time passed.