The legendary Undead Eye Class Mod is a favorite for many Borderlands 4 players, especially for those who play Vex and enjoy sniper builds. To farm this mod efficiently, your best option is to take on Vile Lictor, a boss in Terminus Range's Umbral Foundry found within the Windspear sub-region Borderlands 4 Items for sale (https://www.u4gm.com/borderlands-4-items) .
Like other Order bosses, the main drawback is the time it takes to return to his lair each farming run. Luckily, by using the Encore machine near the jump pad leading into his arena, you can speed up the process and jump straight into fights without annoying backtracking.
Vile Lictor's health system has two distinct phases: his armor protected phase comes first, followed by a shielded phase. To take him down fast, prepare kinetic weapons to shred his armor quickly, then swap to weapons causing corrosive and electric damage to knock down his shields. The recommended strategy is to use your strongest gun for breaking his arms and armor, then switch to a Beam Tosser-equipped Maliwan shotgun to blast through the shield phase.
If you own a Complex Root weapon with corrosive and electric elements, this will make the fight easier because his large hitbox lets you apply continuous damage with it. Otherwise, three shots from a Beam Tosser can be enough to collapse his shield once you're geared well.
Apart from the Undead Eye, this boss has a better chance to drop other legendary weapons and class mods for different Vault Hunters, making each farm run valuable.
Regarding the Undead Eye mod itself: it activates Vex's Blood Shot skill every time she kills an enemy with a sniper rifle. Normally, Blood Shot requires Repkits to trigger, but with this mod, it becomes a Kill Skill. This converts your next shot to kinetic damage and adds a bonus damage boost dependent on Vex's current health. Moreover, all your critical hits have a 33% chance to proc Blood Shot, dramatically boosting damage output.
This makes sniper builds exceptionally deadly, especially when combined with the Finnity XXX-L, a hybrid weapon that fires like a rapid minigun but looks like a sniper rifle. Add a crit throwing knife to this setup, and you'll be shredding enemies fast.
Farm Vile Lictor patiently with this strategy, and you'll soon see your Vex build shine thanks to the Undead Eye Class Mod Borderlands 4 Cash (https://www.u4gm.com/borderlands-4-cash) .