Having played quite a few games now with DH as the expansion, I'm a bit sketchy on the details surrounding the Dunwich Horror . I know how he comes about ~ three monsters into the vortices, and voila! One Dunwich Horror. I also know that each time a monster enters a vortex, the Terror Track increases by 1. Here's the part I'm not sure about. According to the rules,"While it [ Dunwich Horror ] remains in play, each time it moves, there is a chance that another doom token is added to the Ancient One’s doom track."
What is that chance?
Thanks,
The Professor