Too Much Hostility.

If not for the fact that the two wills of the realms are holding each other back, the two clones would be torn apart as soon as they entered the realm or captured, frozen, or tortured by the Will of the Tyrant Realm. They wouldn't be able to joke at all about getting their pound of flesh. 

There was no direct action by the Will of the realm to kill them, but the two of them remained alert and careful. They have to be because the information they got from Mother High Heaven about the era of conquest and the Tyrant race has made them come to the conclusion that they should expect a fight with enemies as soon as possible.

The suppression of the realm would make a fight disadvantageous to them, seeing as they can't use world fragments. Even the use of spatial divine abilities and concepts has been restricted, so no one would be able to teleport into the realm from outside of it.