Shelvent
They have claws and teeth as sharp as razors which are filled with a poison that liquidates the infected from inside out until only skin and bones remain, can jump several meters far and have incredible reflexes.
Their only weaknesses are sunlight which burns their skin, as well as other claws and magical blades.
" . . . There are many doors.
Where they lead, is not always clear.
Only Janus might know, what lies behind.
So we should never open a door irresponsibly.
Or better let it remain shut.
Though – who never opens a door, will never know, what lies behind . . . "
Ilionej Yulanda Nephredinja Flynn-Prescott-Stevens