4338 Monster Pod was a 49 piece X-Pod set released in 2005. It came with a trans-purple pod with purple lids and included instructions for building several different monsters. One of the models was goblin-like in appearance, with one big eye and fangs, another was catapult-like and used one of the plates, and the third resembled a bird. Several of the purple parts included are quite rare. It's recommended for anyone aged 6+.