This season of The Flash has already had more than its fair share of new villains so far, with key characters like The Rival and Savitar having both already appeared in season 3.
[SPOILERS for those not caught up on The Flash ahead.]
Capitalizing on Barry’s “Flashpoint” mistakes, he’s been able to make the differences between the current timeline and the previous ones Barry created, cause major effects on a number of the show’s characters.
Alchemy’s costume from the comics is rather iconic also, but like with most of the Arrowverse’s take on beloved characters, the series’ creative team did a fairly good job at bringing him to life on the small screen.