Buff the Void Star.

[Aquillion]

It's a pity for an artifact with such a cool name to be so generic.

How about giving it the activated ability to use that talent in the Golem magic tree that draws enemies towards you and damages them a bit? It's a talent that's not used much, isn't particularly overpowered, but could be interesting to work into some character builds via an artifact.

[Frumple]

Have it activate for one of the new horror talents. Shards of the void sounds like it might be ideal.