Terrain and triggers

Right, this is to try to clear my idea from my midn and either to trash bin or into the 'modder idea forum'.
Anyeone ever played dungoen keeper, i or II?
Right, can anyone think of a way either with a trigger that somehow..(although i doubt this 100%) is capable of moving terrain down one level ingame?
Or perhaps changing the height (positional, z axis) of a selectable doodad ingame?

Well you could just make a Hole going downwards with Depth = x and width = x
here's and exaple trigger:

Enviromental Shift
Events
Unit - A unit enters replacewithyourregion <gen>
Conditions
(Entering unit) Equal to DungeonKepper 0000 <gen>
Actions
Environment - Create a 2.00 second Permanent crater deformation at (Center of replaceregionwithcraterarea <gen>) with radius 200.00 and depth 50.00


Your going to have to use your own regions where is says replacewithyourreigon and so on
Hope this helps a bit