There are four levels of locks, and you need the sphere of the corresponding level to unlock it (for example, a Lv
An Aura put onto the battlefield this way doesn't target anything (so it could be attached to an opponent's permanent with hexproof, for example), but the Aura's enchant ability restricts what it can be attached to
Anyway, the key thing is that a new MTG set means a bunch of new cards - and that means it's the perfect time to talk about some of the best Innistrad: Crimson Vow cards that have now been spoiled
She lets you cheat (hopefully) big creatures into play as soon as one of her eggs cracks
Like other Gargoyles cards, it shares the special ability that players cannot ready and use the card if they have three or more cards in their hand, which is more of an anti-ability than an ability
Apparently, this will enable you to gain +X/+0 and Menace until end of turn