234 cards found matching energy cost is at least 5

Blitzcrank, Impassive
Bottled Constellation
Brazen Buccaneer
Breakneck Mech
Brynhir Thundersong
Carnivorous Snapvine
Cataclysmic Duel
Clairvoyance
Clash of Giants
Cloud Drake
Combat Chef
Commander Ledros
Concentrate
Conscription
Corina Veraza
Corrupted Dragon
Daisy!
Dame the Despoiler
Darius, Executioner
Darius, Trifarian
Dazzling Aurora
Deadbloom Predator
Decisive Strike
Direwing