Love her, but she's broken in multiplayer and Commander once down with that final ability killing multiple stuff across multiple players and such
Performapals are a deck that look cute but pack a serious punch
There is also a link that will share the drop rates for each set and explain how the system for opening packs works on PTCG Live
As far as regular boosters are concerned, there are three types you could be referring to
It follows, then, that protection from everything is profoundly powerful, as it means "this card can't be blocked, targeted, enchanted, or damaged by anything." A Creature with protection from everything can't be blocked, can't be targeted by Lightning Bolt or Slice from the Shadows, and can't be locked down by a Pacifism or Icy Manipulator