[fixed/closed]Merrow Levitator ability to untap is mandatory

[Aswan jaguar]

Describe the Bug:
Merrow Levitator ability to untap when a blue spell is cast is mandatory.

Which card did behave improperly ?
Merrow Levitator

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
2014/05/06: Journey into Nyx

What exactly should be the correct behavior/interaction ?
Merrow Levitator ability is optional.

Are any other cards possibly affected by this bug ?
-

[Gargaroz]

Fixed in 5a28eb1