The Korumm, the main weapon of the owl Archon Boreal. Personally one of my favorite boss fights in the in the entire game. Its heavy attack and special attack are a must build for. If you don't have a riven [Sacrificial Steel] will do that same job.

But there aren't any actual pressure mods in this build, because of the riven. If you want a pressure mod for less space and more gimmicks you could use [Boreal's Contempt] and the rest of the mods set. This type of weapon, as well as the [Pennant] is goof for frames like [Kullervo] because of their heavy attack gimmicks.

Use Naramon and dexterity arcanes to keep up combo.

Keep in mind that this is how I build MY weapon's an warframe's, they work really well for me, so if you are one of those people that is going to to go into the comments and give me shit is to how I play the game, I will kindly ask you to put a tooth pick under your toenail and kick a wall. JOKINGLY OF COURSE.

If you do decide to follow my builds don't get butthurt if your numbers aren't the same, all the riven's are the ones that "I have rolled" so don't psyche yourself out if you don't get a riven that is a good as the ones in my builds.

Be sure to take a look at my other builds. I also recommend looking at the vault status of all prime variants in the second link below. If you want information on the quests and the requirements, I recommend looking on the actual Warframe website under the game dropbox to look at the warframe profile videos as well as looking at the quest guide and the faction types. Click the third link below if you are interested.

Wiki:
https://warframe.fandom.com/wiki/Prime

Warframe website:
https://www.warframe.com

My Guide for new Players!:
https://docs.google.com/presentation/d/1NDLcIbpVdBX559tW5RVLdmoZ1lNnf_3CsjMLL1KKtco/edit?usp=sharing