The Phaser is one of the entities residing within Level 23. It looks like the phantom smiler with the very skinny and stick-figure like body, but is fully there with sharp claws, pointed legs and a rhombus shaped head that's nothing but a glowing white void. It appears in the first path of Ending 2. It first shows up by phasing through the wall in the hallway playing a very loud sound, and starting to phase through everything in its path in an attempt to get to you. You must run back to the vent in the wall, but once you enter the vent that leads to the next section you must wait for the Phaser to get to the vent too in order to progress. Once it does get to the vent it just "stares" at you with it's hand reaching for you. This is the only time Phaser appears in Level 23, and just serves as a minor chase scene to the next section.

The Cruelest is another one of the entities within Level 23, more specifically the second part of Ending 2. The Cruelest has the basic body structure of a wyvern, with no legs to walk on, large hands and arms instead, exposed bones that seem to resemble a once rib-cage and a head with purple glowing lights. It's found in sub-level 23.3 and is located in a hanging cage in an unreachable place. However every periodically the lights in the sub-level go out and the Cruelest teleports out of the cage, it goes in a circle path around the level searching for someone. The only way to survive it is to not move at all. Moving at all, even if it's on the other side moving will cause it to immediately stop and go towards the person who moved. Once the Cruelest completes its rotation it will teleport back to its cage and the lights go back on.