58 cards found matching color is red, energy cost is at least 3, type is unit

Kadregrin the Infernal
Katarina
Lord Broadmane
Lucian
Magma Wurm
Minotaur Reckoner
Morgana
Noxus Hopeful
Noxus Saboteur
Oasis Raider
Perched Grimwyrm
Prepared Neophyte
Raging Firebrand
Raging Soul
Red Brambleback
Rell
Rengar
Revna the Lorekeeper
Scorchclaw
Scrapyard Champion
Sentinel Adept
Shadow Assassin
Sharkling
Tibbers