Originally intended as a convenient way to keep fortresses free of pests, the gelatinous cube has become widely popular among dungeon-owners for its ability to trap and kill meddlesome heroes. A perfect ten-foot transparent cube, this mindless creature easily slides through the standard dungeon corridor. Instinct: To digest

• Paralyze prey with electric shock
• Slowly dissolve organic matter

Each individual shadow is actually a swarm of tiny, dust-sized demons. No one is quite sure where they come from, or how to kill them, but it is known that children of every species on every plane of existence know to fear the darkness . . . Instinct: To spread

• Devour flesh
• Impersonate voices
• Absorb knowledge from those it kills