373 cards found matching energy cost is at least 4

Captain Farron
Carnivorous Snapvine
Cataclysmic Duel
Catalyst of Aeons
Clairvoyance
Clash of Giants
Cloud Drake
Combat Chef
Commander Ledros
Concentrate
Conscription
Consult the Past
Corina Veraza
Corrupted Dragon
Crescent Guardian
Cruel Patron
Cursed Sarcophagus
Curtain Call
Daisy!
Dame the Despoiler
Darius, Executioner
Darius, Trifarian
Dauntless Vanguard
Dazzling Aurora