142 cards found matching energy cost is 3

Star-Crossed
Sterak's Gage
Strike Down
Sudden Storm
Sunlit Guardian
Svellsongur
Temporal Portal
The Zero Drive
Trevor Snoozebottom
Undying Legion
Vanguard Captain
Void Drone
Void Seeker
Wages of Pain
Whirlwind
Wielder of Water
Wind Wall
World Atlas
Xin Zhao, Vigilant
Yuumi, Magical Cat
Zaun Punk
Zenith Blade