The Shadow Plane is a realm that exists in the same space as the our current plane, yet is invisible to the naked eye. Those who exist in the shadow plane, however, can see everything in the current plane. Heroes can't normally enter the shadow plane themselves; however, if they use a Shadow Pad, they may enter the plane, but only as long as they remain on the shadow pad and don't receive damage or attack.
One often overlooked aspect of the Shadow Plane is that those in it are completely invisible, but that's not true. While those who are not in the shadow plane can't see those who are in it, anything that is in the shadow plane is able to see anything else that's in the shadow plane. That includes placing Shadow Wards and placing normal wards in Shadow Pads.
- So far Kallari is the only hero to enter the shadow plane at will using the ability "Shadow Walk"