A character with Rush has the element of surprise, allowing you to challenge before your opponent can prepare
With so many triggers, Leader, Super-Genius will serve as a formidable draw engine as well
English releases frequently combine multiple Japanese sets into a single English expansion, which means one English set symbol might correspond to two or three separate Japanese symbols
And that hasnt ended, we just flavor stuff after planeswalkers (Jace's Erasure, Liliana's Specter, Chandra's Ignition) or still after legendary creatures (Ezuri's Predation, Daxos's Torment, Kalemne's Captain, Gisa's Bidding, Geralf's Masterpiece, Oona's Grace, etc)
I think almost every Steel deck moving forward will run this Kida card as a sure way to protect their characters before they can start playing their more powerful ones