Animals

The Quadratic Formula
This animal is often depicted on "Hang In There!" posters.
Cat

Weeping Willow
Typically depicted as a harless dog-like creature, this mythical Latin American cryptid is infamous for allegedly attacking livestock and draining their blood.
Chupacabra
Appearing in the 2015 narrative horror game 'Until Dawn', this cryptid is created when a human resorts to cannibalism out of desperate starvation, eventually transforming them into this malevolent humanoid monster.
Windego