234 cards found matching energy cost is at least 5

Jayce, Brilliant Inventor
Jeweled Colossus
Jinx, Rebel
Kadregrin the Infernal
Kai'Sa, Evolutionary
Karma, Channeler
Katarina, Reckless
Kayn, Unleashed
Keeper of Law
Kharox
Kha'Zix, Evolving Hunter
King's Edict
Lee Sin, Ascetic
Lee Sin, Centered
Leona, Zealot
Lillia, Protector of Dreams
Lord Broadmane
Lux, Illuminated
Machine Evangel
Maddened Marauder
Maduli the Gatekeeper
Mageseeker Warden
Magma Wurm
Master Bingwen