One Piece art products move fast
Changeling creatures are both snails and rats, so if you cast a changeling, you can use the rat trigger to grow itself and sacrifice it later to draw cards
When you can spectate, you have access to all hidden zones in the game (basically players hands, cards that are face-down, or exiled face-down cards)
The nice thing about Jarad is that sacrificing the Cactuar is part of the cost, so theres not much your opponents can do at that point other than counter the ability
GameStops attempt to behave like your local TCG store could only ever have been a bizarre corporate pastiche of the concept
For example, hunting up Underworld Breach, Lion's Eye Diamond, and Sevinne's Reclamation ensures you have a Breach line, no matter what your opponents give you