Collectible Card Game Headquarters

Describe the Bug:
When Last Stand deals lethal damage to a creature with persist the creature is exiled and an Air Elemental legacy card is put in caster's hand.

Which card did behave improperly ?
Last Stand

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
2014/05/06: Journey into Nyx

What exactly should be the correct behavior/interaction ?
Creature should just die.

Are any other cards possibly affected by this bug ?
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I had this dump error before the Air Elemental legacy appeared in my hand.The legacy appears in casters hand no matter if you target your creature or opponents creature.
bad parameters
get_card_instance(0, -1)
0: 0x0236D5D4
1: 0x0232F235
2: 0x02335A1F
3: 0x0233C825
4: 0x023212E5
5: 0x0232DD75
6: 0x02378335
7: 0x023387E3
8: 0x00435A13
9: 0x004771DA
10: 0x00436922
11: 0x023368AC
12: 0x0043BFAA
13: 0x004399BD
14: 0x0047902C
15: 0x004946E9
16: 0x7C80B713

Fixed in f89c52b