The rarest: Prism, Secret, and Jumbo Among the 309 cards in Parts 1 and 2, 24 Prism cards (holographic) are the most sought-after pieces
Benthic Biomancer Another merfolk all-star, Benthic Biomancer goes in more decks, including counter shenanigan decks like Chisei, Heart of Oceans or Goldberry, River-Daughter
In addition to being basically a Fusion-Equip-Spell Card, the card also has a die roll effect where when the Monster it's equipped to battles another, you roll a 6-sided die and your opponent's Monster will be banished for that many of your opponent's turns until the first Standby Phase after the last turn of the effect
If you cast more than one Heroic Sacrifice in one turn, all damage that would be dealt at once to you and/or permanents you control is dealt to one of the chosen permanents of your choice
A few years ago there were legions of such schoolgirls, many of whom openly admitted (for tabloid TV shows and magazines) that they wore no underwear under their skirts