194 cards found matching energy cost is at least 5

Raging Firebrand
Recruit the Vanguard
Reinforce
Rek'Sai, Swarm Queen
Renata Glasc, Mastermind
Rengar, Trophy Hunter
Revna the Lorekeeper
Rhasa the Sunderer
Rift Herald
Riptide Rex
Ruined Rex
Ruin Runner
Rumble, Scrapper
Safety Inspector
Sai Scout
Sandshifter
Scrapyard Champion
Scrutinizing Sergeant
Sett, Brawler
Shard of Undoing
Simian Ancestor
Singularity
Sivir, Ambitious
Sky Splitter