Mess with your opponents by playing on their turn with a Flash of Ferocity! Control the tempo of the game with Brazen Borrower and the like by dismantling your opponent's plans with cheap countermagic and flexible creatures. 

Each Flash of Ferocity deck contains the following 75 cards:

1 Brazen Borrower
4 Nightpack Ambusher
1 Wavebreak Hippocamp
4 Wildborn Preserver
4 Brineborn Cutthroat
4 Frilled Mystic
4 Spectral Sailor
2 Thassa's Intervention
4 Opt
4 Quench
2 Sinister Sabotage
2 Unsummon
2 Castle Vantress
1 Fabled Passage
2 Temple of Mystery
3 Thornwood Falls
8 Forest
8 Island

Sideboard:
3 Shifting Ceratops
3 Aether Gust
2 Disdainful Stroke
2 Mystical Dispute
2 Negate
3 Threnody Singer