http://magic.wizards.com/en/articles/archive/latest-developments/challenges-revisiting-sets-2015-09-11
Yes, Mark, they are colorless. This is not new, nor is it a thing that can actually connect them mechanically.
Soonest we'd see the fetches is next Fall.
They are aware the game has these things called artifacts right?
And that they have already screwed up the design space for them and enchantments by making them coloured?
I really don't understand how they got to this point with the Eldrazi. It seems utterly contrary to everything they have been saying the last few years about mechanics following emotion - devoid means *nothing*. It has zero emotional resonance. The game already has colourless cards aplenty, it has since year one. Mechanics have resonance when they mean something - devoid is completely parasitic, and has little effect outside of this block.