Talk:Limbo/@comment-72.205.226.43-20180723191427/@comment-219.92.77.9-20180810142635

It's like right there in the description.
 * Units can only damage other units if they are both in the same dimensional plane. Units on different planes cannot damage or be damaged by each other, nor be affected by knockdown, stagger, and Status Effect procs.

And naturally you can't damage things out of phase with you, but they can't damage you either.