Warper

Interdimensional Travel (3/day). As an action on the warper's turn, it can transport itself to a dimensional plane of it's choice at a random location in the realm.

Incorporeal Movement. The ghost can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object.

Demiplane Compass. The warper can automatically sense where each and every demiplane can be found, who it is owned by, and if and what every living thing inside of them are.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 7 (3d8 + 3) piercing damage.