Of course, drawing up to seven cards is nothing to sniff at, but when youre paying this much mana on your commander you want it to do a little more than that
Pikachu's always had a knack for stealing the spotlight
With that out of the way, here are the MTG most expensive Tarkir: Dragonstorm cards

Aboleth Spawn Abstruse Archaic Adric, Mathematical Genius Ancient Greenwarden Annie Joins Up Annie Joins Up Brokers Confluence Clara Oswald Cloud, Midgar Mercenary Consign to Memory Defabricate Delney, Streetwise Lookout Deny the Witch Detect Intrusion Disallow Drivnod, Carnage Dominus Echo, Perceptive Prodigy Echoes of Eternity Elesh Norn, Mother of Machines Emerald Dragon Emerald Dragon Ertai Resurrected Felix Five-Boots Firebender Ascension Gandalf the White Gogo, Master of Mimicry Green Slime Harmonic Prodigy Isshin, Two Heavens as One Isshin, Two Heavens as One Katara, the Fearless Kirol, Attentive First-Year Krang, the All-Powerful Lithoform Engine Louisoix's Sacrifice Mirror Room // Fractured Realm Mirror Room // Fractured Realm Mister Fantastic Naban, Dean of Iteration Nimble Obstructionist Overcharged Amalgam Panharmonicon Panoptic Projektor Peter Parker's Camera Phenomena Recorder Repudiate // Replicate Repudiate // Replicate Return the Favor Roaming Throne Roaming Throne Sanctum of All Scientist Supreme of A.I.M

This would represent her speed in-game and serve as a fun nod to Lightning (bolt). It may not seem very powerful, but perhaps she can be flickered or has an ability to flicker herself