Savitar

'The Flash' Season 3, Episode 7: 'Killer Frost'
This week, Caitlin goes rogue as her ice powers kick in, Wally becomes an Inhuman, Savitar pops his claws, and Alchemy is revealed. "Killer Frost" was directed by Kevin Smith from a story by Judalina Neira, and a teleplay by Andrew Kreisberg and Brooke Roberts.
Rogues' Gallery: The Flash's Top Ten Villains
A hero is defined by their villains, and the world of superhero comic books is filled with some of the scariest and silliest bad guys around. Rogues’ Gallery aims to settle the score and determine who is the true arch-nemesis for some of favorite superheroes, and we need your help to do it!

Rogues' Gallery: Who Is The Flash's Greatest Enemy? [Poll]
A hero is defined by their villains, and the world of superhero comic books is filled with some of the scariest and silliest bad guys around. Rogues’ Gallery aims to settle the score and determine who is the true arch-nemesis for some of favorite superheroes, and we need your help to do it!