Very Beast Friends

Sumerian gods Anshar (god of wind and water) and Kishar (god of fire and earth) are waging their millennial fight. As gods, they are immortal, and thus neither can ever defeat the other, and can only face each other once every thousand years. They decide to transfer themselves to mortal bodies in order to settle their fight. As it happens, the Ghostbusters are going sailing that day. The strong winds created by Anshar and Kishar blow the boat off course and strand the men on the island created by the gods. Peter is angry at Ray for getting them stranded, and Ray returns the anger. As a result of this, Anshar and Kishar possess the two Ghostbusters. Every time that they start arguing, they mutate into the gods, getting bigger and meaner each successive time. Egon, Winston and Slimer must find a way to depossess them before their friends kill each other.