Thopters, unicorns or vedalken
According to Takahashi, Seto's feelings for Kisara are the basis of Kaiba's modern-day obsession with the "Blue-Eyes White Dragon." After her death, Seto holds Kisara's lifeless body in front of the tablet - notably, this is the vivid vision Kaiba sees during his Duel with Ishizu in Battle City
It enters with no base lore value
It can clear your opponents entire back row if they are unable to negate it
Several factors influence XY card values: card condition (mint cards worth 3-5x more), rarity (holographic and rare cards command higher prices), first edition status, PSA/BGS grading scores, and market demand for specific Pokemon
Unpredictable Cyclone is exactly that, by being a card that cycles, and also the card that lets you build fun and elaborate combos around the mechanic