Collectible Card Game Headquarters

Describe the Bug:
Thrull Retainer no regen

Which card did behave improperly ?
Thrull Retainer

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
Manalink 2015/12/25: Battle For Zendikar,duel

What exactly should be the correct behavior/interaction ?
Thrull Retainer regen

Are any other cards possibly affected by this bug ?
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Reported from the BFZ git, seems to be regen was working in its earlier version but without the +1/+1 bonus...
Can't seems to activate even on regen phase, it seems to autotrigger when enchanted creature is buried but do nothing.

I'll move this to Carapace's version once someone besides me tests the latter a bit.

I tested Carapace and works fine.

Reimplemented fb42dd5.