Fiendish Foes is an 8-page micro-supplement for Four Against Darkness.
Is your party 3rd level or above?
Are you tired of encountering always the same creatures?
Then -- use the additional random tables in Fiendish Foes. Just be warned -- the monsters here are deadlier than what you are used to. You'll need your wits and a bit of luck to avoid a total party kill.
Contains game statistics for classic dungeon monsters like blood-sucking birds and jelly-cubes.