If viewers thought The 100's season 2 finale was stressful, then they should brace themselves for "Blood Must Have Blood."

What Twists Will 'The 100' Finale Take? Jason Rothenberg & Alycia Debnam-Carey Tease 'Blood Must Have Blood'

Part 1 of the season 2 finale will air this Wednesday, and writer Aaron Ginsburg is busy winding fans up for what appears to be white-knuckle ride.

"The last episode I wrote, I bombed an entire village," Ginsburg teased on Tuesday. "Just imagine the fun I'll have in #The100 Ep 2x15: "Blood Must Have Blood." #BeAfraid."

'The 100' Season 2: What Is The City Of Light? Jason Rothenberg Teases Shocking Answer

Now that Bellamy has disabled the acid fog, the Grounder/Arker army is ready to move on Mount Weather. Bellamy's mission isn't over however, as the young leader must rally the Mountain Mens' Grounder prisoners in an effort to attack the stronghold from both inside and out.

Writers for The CW drama have proved on multiple occasions that they are not afraid to take a life, and it remains to be seen how fast the bodies will stack up as season 2 draws to a close. A new sneak peek (see below) shows that at least two characters will meet their demise before part 1 ends.

"It's so insane, and it's so big, and it's completely not what you would see on The CW," Ginsburg told the Nerdist Writers Panel (via Pop Insomniacs). "It's merciless. It's really, really merciless."

Find out more when The 100 airs Wednesdays at 9 p.m. ET on The CW.