221 cards found matching energy cost is at least 5

Reinforce
Renekton
Rengar
Resplendent Rostrum
Revna the Lorekeeper
Rhasa the Sunderer
Rift Herald
Riptide Rex
Rousing Display
Ruined Rex
Ruin Runner
Rumble
Safety Inspector
Sai Scout
Sandshifter
Sandstone Chimera
Scrapyard Champion
Scrutinizing Sergeant
Seraphine
Shadow Assassin
Shadowblade Lurker
Shard of Undoing
Simian Ancestor
Singularity