Monster Hostile NPC units for Dimensions:

get players a new item, that acts as the spawn point for Hostile NPCs to attack and destroy. Allow the Owner to choose the respawn timer on the NPC.

The NPC would respawn at the item drop point.

This allows players of the game to make their own sort of Dungeon, or Wave defense sort of game out of their Dimension.

This can be so fun. Player made PvE.

Also a few Powerful Elites and Bosses would be nice.

With something like this, we could pretty much make our own Dynamic Zone Invasions.