In next week's episode of The Flash, Central City gets bloody for Halloween.

The fourth episode of Season 6, ominously titled "There Will Be Blood," features new recurring character Ramsey Rosso as he descends further into villainy as the twisted Bloodwork. The CW has released a promo for the episode, showing the Scarlet Speedster and Killer Frost arriving in a hospital attacked by Ramsey as he continues to sacrifice his humanity through his connection to dark matter.

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Much of Season 6 has involved Barry Allen preparing the rest of Team Flash for his long-predicted demise during the upcoming "Crisis on Infinite Earths." This has included Cisco stepping up on the team, while Caitlin Snow has embraced her Killer Frost persona.

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Considering this terrifying new villain, Barry and Killer Frost will have to stay one step ahead of Bloodwork if both heroes hope to even survive Halloween.

Airing Tuesdays at 8 p.m. on The CW, The Flash stars Grant Gustin, Candice Patton, Carlos Valdes, Danielle Panabaker, Tom Cavanagh, Jesse L. Martin, Danielle Nicolet and Hartley Sawyer.

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