Can I undo the upgrade later? DARK SOULS™ III > General Discussions > Topic Details. For Dark Souls III on the PlayStation 4, a GameFAQs message board topic titled "Irithyll Straight Sword vs. Irithyll Rapier". Irithyll Straight Sword is a Weapon in Dark Souls 3. It's such a cool sword and has been really useful to me. I am at the point I need to use two twinkling titanite to go to +2, and I wonder if it's worth it. While my original plan was to go with a dex/int build to eventually get my hands on friedes scythe I've found a love for the straight sword move set. Description Straight sword bestowed upon the Outrider Knights of the Boreal Valley. I would not recommend going for a pyro build if you want to stick with the sword but pyromancy will be very strong very soon if you find the hidden area a little ahead. Apr 25, 2016 @ 1:57am Irithyll Straight Sword worth upgrading? ? Straight sword bestowed upon the Outrider Knights of the Boreal Valley. Mister Shan. ? For Dark Souls III on the PlayStation 4, a GameFAQs message board topic titled "Irithyll straight sword review? So far I just beat Lord Hodnir. ". Game: DARK SOULS™ III Platform: Steam Genre: Action Developer: FromSoftware, Inc. This weapon is enshrouded in frost, and causes frostbite. The Irithyll Straight Sword is a Straight Sword Weapon found in Dark Souls 3. Just after a bit of advise for builds around this weapon for both pve/PvP. 4 years ago. Every Outrider Knight one day devolves into a beast, constantly houded by Pontiff Sulyvahn's black eyes. Barbed straight sword (heavy/refined/sharp) + carthus rouge all day every day. I've recently picked up DS3 and have managed to make my painstaking way to the road of sacrifices and grabbed the irithyll straight sword on the way. Pyromancy scales of two stats, Int and Faith. The Irithyll straight sword is a quality weapon, scaling of dex and str. Notes and Tips: Upgraded with Twinkling Titanite. Publisher: FromSoftware, Inc., BANDAI NAMCO Entertainment Release Date: 11 Apr, 2016.