Board Thread:Warhammer 40k General Discussion/@comment-211.26.90.118-20130728064425/@comment-211.26.90.118-20130729094807

And from Octavian 146: Their intelligence is 100 billion years old, they are indestructible in their meta-physical form, and can twist or corrupt all intelligence as well as create life. They can think indestructible objects into existence and move them through slip space instantly via thought. They are also extra-galactic.

The corrupt space-time as well as alternate dimensions as they were able to alter slip-space so that Forerunner engines could no longer enter it.

At full power they are essentially gods that can impose their physical influence across multiple dimensions. Chaos can only project facsimiles of life in the forms of daemons into real-space.