169 cards found matching energy cost is 3

Sterak's Gage
Strike Down
Sudden Storm
Sunlit Guardian
Svellsongur
Temporal Portal
The Zero Drive
Tornado Warrior
Trevor Snoozebottom
Twilight Reveler
Undying Legion
Up from the Deep
Vanguard Captain
Void Drone
Void Seeker
Wages of Pain
Whirlwind
Wielder of Water
Wind and Ghosts
Wind Wall
World Atlas
Xin Zhao
Yuumi
Zaun Punk