[MegaBlues]

Impure Element's Null damage seems to be equal to 100% of Void Energy rather than the 50% the tooltip states.

[Neus]

This has been corrected.

[MegaBlues]

Also, the damage is dealt for any spell cast, regardless of domain or if damage is done at all.

So casting Blink would trigger the damage, for instance.

sorry i just noticed

[Neus]

Yes, as it says, it will do damage any time you cast a spell.