Collectible Card Game Headquarters

Describe the Bug:
Duneblast's help text reads "Select a creature to sacrifice".

It resolves as intended.

Which card did behave improperly ?
Duneblast

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

What exactly should be the correct behavior/interaction ?
Duneblast's help text reads "Select a creature" or "Select a creature to keep".

Are any other cards possibly affected by this bug ?
-

Also, it is 'up to one' creature, so you should be able to choose none and destroy all creatures.

Fixed in d8abaef

Help text is fixed, but you still have to choose a creature when it is 'up to one'.

Fixed in 0183ef8