To be honest, its just too good and too flexible
Since cycling generally costs one or two mana, no matter what cycling creature you end up hitting with Unpredictable Cyclone, you'll come out way ahead in terms of mana, paying two for a four-, five-, or even seven-drop, which sort of puts Unpredictable Cyclone into the Wilderness Reclamation / Fires of Invention category of absurdly powerful ramp spells that only work in fairly specific decks
These symbols form the base hierarchy of the game: Beyond these core tiers, there are additional designations including SP (Special Rare), TR (Treasure Rare), and P (Promo) that sit outside the main rarity ladder but are often among the most valuable cards in the game
Transforming this card into Green Goblin, or just casting it outright means youll have cost reduction on all spells you cast from your graveyard (not only instants and sorceries), and you can set up an engine where you discard a card and immediately cast it for a reduced cost
It works with the graveyard, with zombies, with tokens, and with reanimator
But why does thickness matter in trading cards