Collectible Card Game Headquarters

Describe the Bug:
Old Man of the Sea's activated ability costs to activate.

Which card did behave improperly ?
Old Man of the Sea

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
CoRM15 mini, duel

What exactly should be the correct behavior/interaction ?
Old Man of the Sea's activated ability doesn't cost mana to activate.

Are any other cards possibly affected by this bug ?
-

Also 1- Old Man of the Sea always untaps at your untap step without asking you if you want to untap him.
edit 2- the prompt when you use the ability asks "select target artifact" instead of "select target creature" it can select only creatures though.

All fixed in 19e7fb0