Power ore is the only world gen added by dartcraft. Power ore can be found in the overworld and also the nether. You can find power ore below y level 48in the overworld.
When power ore is broken by a pickaxe it yields 2-4 Force Gems. This value is fortune effective.In the config settings for dartcraft you are able to allow re-generation of power ore. This setting is mostly for players that have created a world before they added dartcraft and wanted to have some power ore spawned legitimately.