Yes, its no surprise if Gandalf is coming from your command zone, but the additional flicker trigger is massive, well supported in white, and a worthy ability of a wizard that needed to evolve to compete with Saruman
There's a lot of really notable cards that didn't make the cut, however, such as the likes of Teleportation Circle and Conjurer's Closet for repeated flickers or Cosmic Intervention for a more sweeping solution
So, let's go over perhaps the most important part: finding a place to play a Prerelease
Even though it has a high mana cost, it hits all of your opponents
Because we were trying to do top-down designs, we matched the "enters the battlefield" effect to the flavor of the land, so the mine creates Dwarves and the Gingerbread Cabin makes Food
Card Set(s) -ONE PIECE CARD THE BEST- [PRB-01] CARD VIEW ST07-007 | C | CHARACTER Charlotte Brulee Attribute Special Block icon 1 Effect [Blocker] (After your opponent declares an attack, you may rest this card to make it the new target of the attack.) Trigger [Trigger] Play this card