These stand out immediately and are considered rare because they look like unfinished prototypes
Both of those cards untap permanents in general which includes lands, creatures, enchantments, artifacts, and even planeswalkers, but many cards specialize in specific permanent types
Scourge of Fleets Scourge of Fleets works bestalmost exclusivelyin mono-blue decks, where it soft locks your opponents with cards like Thassa, Deep-Dwelling or Conjurer's Closet to prevent them from maintaining a board state
These decks usually contain a rulebook, a playmat, a coin, and 60-card deck, and damage counter
Search your deck for up to 3 Water Energy cards, reveal them, and put them into your hand
maybe three if were in a good enough spot to push through the Oubliette room of Tomb, though I wouldnt count on that