Zombies and Magic!

In a different world where Magic is everywhere A Dark Witch created an army of Zombies and now they are trying to destroy every city. A group of Wizards are entrusted with the job of get rid of all the zombies and save the world. But all the great wizards are old and can't do much so they decided to summon someone from the other world to help them. While summoning spell was cast something wrong ha