Vampire Hexmage & Aether Vial

[rufus]

If Vampire Hexmage's ability is used in response to Aether Vial activation, is the Vial ability restricted to 0 cc creatures?

[quicksilver]

If Vampire Hexmage's ability is used in response to Aether Vial activation, is the Vial ability restricted to 0 cc creatures?

Yes, at least until he ramps it back up again.

[tivadar]

Vial doesn't target, which means checking counters is part of the resolution. So yes, if he taps vial and you hexmage in response, that vial activiation is restricted to 0cc creatures.