The Soul Eating Cat is a horror created by demon worshiping witches. They are common house cats that have been slain by a wight. They still appear as such until you meet their gaze whereupon the victim sees that where their eyes should be are two orbital sockets bigger than they should be. Meeting the gaze of these creatures drains the victim one level each time they meet the cats gaze.
Armor Class: 6
Hit Dice: 1d4
Like all undead they are immune to sleep and charm spells but despite being undead they cannot be turned by a cleric of any level. Anyone trying to attack them while avoiding their gaze does so at -4 to hit.
Late night thoughts. This is all I have on this so far.