4994 Fierce Creatures is a Creator set released in 2008. It contains 193 pieces to construct a spider, dragonfly, or a snake. Only one can be built at a time.
This is a description taken from LEGO.com. Do not modify it.
Build ferocious beasts!
Build a realistic and scary spider with eight long legs, big fangs and a bulging abdomen that can move up and down. Make it even scarier by rebuilding it into a creepy bug or slithering snake. Spider legs move at 2 joints! Spider measures over 10' (25 cm) side to side and over 8' (20 cm) front to back! Includes instructions to rebuild into a creepy bug or slithering snake!