Not only will Strong Back buff your creature up immensely with multiple Auras and Equipment attached, but it will also make those Auras and equipment easy to attach to your creature
It wasn't quite as successful as we hoped
Bolster itself doesn't target any creature, though some spells and abilities that bolster may have other effects that target creatures
Umbra Mystic Heres another Killian, Decisive Mentor mover, though I'm a bit more skeptical about this one
Basically, there's very little I like about these sleeves, other than the fact they are dirt cheap
I mean, the legendary artifact is by far more useful in coin flip decks than the rest of poor old Krark, as weve already seen with Krark, the Thumbless