[fixed/clos]Uktabi Faerie can be activated without a target.

[Aquillion]

Describe the Bug:
The AI, at least, can activate Uktabi Faerie with no target, sacrificing it to no effect. It shouldn't be able to do so; you can't activate its ability with no valid target in play.

(This is not an AI bug, at least not in the sense of the AI behaving irrationally -- the AI does it, in the attached save, when I try to target it with Shauku, Endbringer, cleverly denying me the +1/+1 counter Shauku, Endbringer would otherwise get. But it's still not a legal play.)

Which card did behave improperly ?
Uktabi Faerie

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
KOT, duel

What exactly should be the correct behavior/interaction ?
Uktabi Faerie's ability should only be activatable when there is an artifact to target with it.

Are any other cards possibly affected by this bug ?
Possibly other activated abilities that require targets, although it would only be noticeable when the cost has a side-effect (like sacrificing it.)

[Nexhro]

The problem is that its ability can only target players and deems artifacts illegal targets (help text reads "Illegal target (where)" when attempting to target an artifact).

[Gargaroz]

Fixed in 55e97a5