Last week, the big bad monster speedster on The Flash revealed his true identity. Savitar, the so-called God of Speed, stepped out of his Megatron-esque armor to confirm most fans’ suspicions: he’s a scarred Barry Allen from the future, one who has “lost everything” and now wishes that upon his younger self. In a new interview, producer Andrew Kreisberg says that this reveal will devastate the rest of Team Flash.

“Those scenes that are coming up over the next few episodes, as everyone gets a real glimpse of this person, it’s this mixture of both horror and sadness,” Kreisberg told Entertainment Weekly. “His visage is obviously very upsetting … seeing the scar and the milky white eye, but also seeing the person that you love be so twisted.” Kreisberg says that Barry Allen’s reputation for having “the gentlest soul of all of the characters in the Arrowverse” — aside from, y’know, selfishly rewriting the timeline — will be “heartbreaking” to “see how far he could fall.”

Savitar is certainly a different flavor of antagonist compared to previous foes like Eobard Thawne and Hunter Zolomon. He’s not just another evil speedster who wants Barry to get faster for some arbitrary, plot-driven reason. Instead, he wants Barry to feel pain, agony, and loss. While fans might not have been as shocked for the Savitar reveal as they were when “Jay Garrick” unmasked as Zoom last season, there’s a weight to Savitar that neither the Reverse-Flash or Zoom had to them.

The Flash airs on Tuesdays at 8 p.m. Eastern on The CW.