In the movie The Cabin in the Woods , zombies , a werewolf , a giant snake , wraiths , a unicorn and a merman are released , who wreak havoc and slaughter the staff .
Cornered by the Facility 's security troops , she and Marty release the multitude of monsters , including zombies , a werewolf , a giant snake , wraiths , a unicorn , and a merman , among others , who wreak havoc and slaughter the staff .
The Cabin in the Woods