Divine Barrier

The space between the planes that the gods can't travel through. The gods allow each of themselves to bestow power to select individuals, but only so much of their influence can be exerted on the world at a time. To prevent the gods from directly interfering they created the Divine Barrier to keep themselves out and to ward off temptation.

Kaazarlex the Betrayer found a way to circumvent this barrier and invaded the world nearly 400 years ago, sealing it behind him and making it extremely difficult for divine magic to poke through. The rest of the gods eventually discovered how to bypass it as well with the help of mortals on the other side, and brought the renegade god to its knees to drag him back through