[fixed] Darksteel Mutation removes supertypes, confusing

[Korath]

Describe the Bug:
Darksteel Mutation removes its enchantee's supertypes and hides its card name. (In my screenshot, the enchanted creature is another Griselbrand; it doesn't get state-based-killed by the legend rule, but both are affected by some vile hackery if I cast Bile Blight or a similar spell on one.)

Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
dev master, cc7a64681.

What exactly should be the correct behavior/interaction?
Basic/legendary/snow/world status should stay put, and the card should still display with its own name and image. I'd also frankly be astounded if said vile hackery worked in all cases of comparing card names.

Are any other cards possibly affected by this bug?
I can't find any fully-working auras with "Enchanted creature.*loses all abilities", so yes. But not this precise variant.

[drool66]

Fixed in d693305