207 cards found matching energy cost is at least 5

Glasc Mixologist
Grand Strategem
Guardian of the Passage
Harnessed Dragon
Horns of the Dragon
Hostile Takeover
Hwei
Iascylla
Icathian Rain
Illaoi
Imperial Decree
Imposing Challenger
Inviolus Vox
Ivern
Jae Medarda
Jaull-Fish
Jax
Jeweled Colossus
Kadregrin the Infernal
Kai'Sa
Karma
Katarina
Kayn
Keeper of Law