The most basic lesson here is run answers already
You can keep those permanents around forever if you have a way to remove the finality counters or move them to an opponents permanent
Craft requires you to choose some permanents, but exiling the card and materials is part of the cost to craft and flip the card
Accepting other colors gives you access to similar pillow fort cards like Ghostly Prison, Propaganda, and Sphere of Safety that stop your opponents from attacking you specifically
Just as MV, this lets you choose if you want the search to be equal, higher, or lower than the searched number
While it feels tailor-made for answering threats that are difficult to remove, it can also be used to shuffle any annoying artifact or enchantment back into its owner's library and disrupts the topdeck manipulation that you'll see in many popular decks