To get the Clawstrider override in Horizon Forbidden West, you need to override the core of Cauldron IOTA. Cauldron: IOTA is on the far north of the map, a short distance west of the Ninmah Research Lab that you’ll visit during the Cradle of Echoes main quest. It is guarded by two Apex Leaplashers, but these are easily disposed of with a few Purgewater traps and a good beating from your spear. The main door to Cauldron: IOTA is closed and there’s no way to open it, so head northwest to find an alternative way in.
In the middle of the southern half of the search area is a deep crevasse. Carefully climb down into it, deal with the Tracker Burrowers (Acid Traps are your friend here), then go into the tunnel at the north end. Follow the tunnel until you arrive inside Cauldron: IOTA. By now, the game will have warned you if you’re well below the required level, and advised you to make sure you’re well prepared. It’s right: you should be at least level 17 and equipped with plenty of Shock, Purgewater, and Acid traps and ammo before you attempt this Cauldron. You can probably manage it at a lower level though, if you’re badass like us.
Drop down from platform to platform, then head northeast, follow the tunnel around to the left, and go through the Cauldron door. Turn left and kill the Leaplashers, being careful not to fall in the lava. Grapple across the lava and you will encounter a Clawstrider. Try to lay down as many Shock traps as you can before it spots you. Landing Critical Strikes while it’s shocked will make this fight a lot quicker.
Related: How to complete Cauldron: Mu in Horizon Forbidden West
Override the Network Uplink on the west wall and a kind of ladder will appear above it. Climb up to the top, then jump
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