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Describe the Bug:
When the AI stole my Tajic, Blade of the Legion via Merieke Ri Berit 's ability and then untapped Merieke, Tajic went straight to my graveyard.

AI then stole another creature enchanted by Indestructibility and when I untapped Merieke via debug command, that creature died as well.

Which card did behave improperly ?
Merieke Ri Berit

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
April 17 2014, duel

What exactly should be the correct behavior/interaction ?
When Merieke Ri Berit becomes untapped or leaves the battlefield, the creature stolen using Merieke's ability is destroyed. Hence, indestructible creatures should remain on the battlefield under Merieke's controller's control for as long as that player controls Merieke.

Are any other cards possibly affected by this bug ?
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Problem is that Merieke is continuously checking to see whether it's in an untapped state, instead of just at well-defined times like EVENT_STATIC_EFFECTS. This includes in the middle of other events, and specifically while it's still trying to figure out whether the card it's about to bury is indestructible.

Fixed 208a031.