304 cards found matching energy cost is at least 4

Starhound
Stealthy Pursuer
Stellacorn Herder
Stormbringer
Stormclaw Ursine
Super Mega Death Rocket!
Syndra, Transcendent
Targonian Visionary
Taric, Protector
Tasty Faefolk
The Harrowing
Thermo Beam
The Ruination
Thousand-Tailed Watcher
Tianna Crownguard
Tibbers
Time Warp
Towering Combatant
Towering Pairofant
Tricksy Tentacles
Trinity Force
Trove Golem
Tryndamere, Barbarian
Twisted Fate, Gambler