194 cards found matching energy cost is at least 5

Mageseeker Warden
Magma Wurm
Master Bingwen
Master Yi, Unstoppable
Mega-Mech
Megatusk
Mindsplitter
Minotaur Reckoner
Miss Fortune, Captain
Monch
Moonlight Affliction
Mountain Drake
Needlessly Large Yordle
Ornn, Blacksmith
Ornn, Forge God
Overt Operation
Peak Guardian
Petty Officer
Playful Phantom
Poppy, Defender of the Meek
Poppy, Paragon
Possession
Progress Day
Promising Future