I love this idea! Maybe certain eggs are better for summoning certain familiars. Maybe unusual eggs could produce different effects for the summoned creature, like a snake egg giving it a scaly armoured skin. Frog eggs, shark eggs, fish eggs, spider egg sacks! Ohh wow, that could be cool. Swarms of tiny, posionous, eight legged familiars, oohhhhh hooooo. Go to Comment
The heroes find the crumbling, overgrown ruins of what appears to be some sort of grand dining hall in the forest. Deciding that it is a good place to camp, the set up a fire in the center. However, they are woken in the night to see skeletons waltzing in the moonlight to organ music that emanates from the open air. The skeletons touch nobody, dancing around them all night.