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Describe the Bug:
Druid's Deliverance prevents damage made from Banshee 's activated ability.

Which card did behave improperly ?
Banshee ? Druid's Deliverance ?

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
Previous update: Manalink update 14 November 2014: Khans of Tarkir + more

What exactly should be the correct behavior/interaction ?
Druid's Deliverance prevents only combat damage made to you.

Are any other cards possibly affected by this bug ?
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Prevents damage from Prodigal Sorcerer 's ability too, so isn't just Banshee

Fixed in a902198