A one or two mana ramp creature made on turns one or two respectively is incredibly powerful and represents a huge tempo play in most cases
Fire Lord Zuko (Borderless Battle Pose) Katara' Water Tribe's Hope Our introduction to waterbending is, fittingly, Katara, Aang's traveling buddy from the Water Nation
The old minimal banlist had only worked because it was so irrelevant, with only a handful of cards which would potentially be in consideration for the average 2020s deckbuilder
"As" abilities generally do not use the stack
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
There were only two such Blastoise cards printed