A large crack appears that dispels a purple light and skeletons crawl from it. Whoever cast the spell can control these skeletons and make them do their bidding. If more than half of the skeletons are killed, roll a d20, if the roll is lower than the casters spell save DC, the skeletons all disappear. If it is higher, nothing happens. The amount of skeletons summoned is determined by the roll of a d100. The damage the Spellcaster takes is the amount of skeletons + spellcasting modifier.