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Describe the Bug:
When opponent attacks and you activate Quicksand it doesn't show the dialog screen which gives you the option to wether tap Quicksand for mana or use it's sacrifice ability to give attacking creature without flying -1/-2 until end of turn. It immediately asks to select target creature and when you do Quicksand just goes to the graveyard without giving target attacking creature without flying -1/-2 until end of turn.

Which card did behave improperly ?
Quicksand

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
ManaLink3.0, September 2013 ooav2 / type = duel

What exactly should be the correct behavior/interaction ?
Quicksand should show a dialogue screen to give you the option between it's mana ability and sac to give -1/-2 AND when the latter is used it should give target attacking creature without flying -1/-2 until end of turn

Are any other cards possibly affected by this bug ?
No

When you try to manually tap it,it always asks for target creature not only when in combat after attacker's are selected till end of combat.
If you try to activate and then you cancel it taps and gives you 1 mana.

Rewritten in c33f0a2.