The end game boss Terramorphous drops an orange class mod for each class, granting the title 'Slayer Of Terramorphous'.
It is said that there are rare orange rarity class mods out there, waiting to be found by Vault Hunters who can bring down the very toughest monsters Pandoran adventurers have seen to date…
(Equip a class mod that boosts a skill you haven’t purchased, and you’ll gain no bonus.) You can ultimately invest five skill points into a particular skill to cap it, then (if you’re lucky) snag a class mod that grants five or more extra points into the skill, doubling the effect, or even more! Class mods frequently come with bonuses to certain skills granted by the class mod-essentially, class mods can add more points into skills as long as you’ve spent one hard-earned skill point to unlock a skill in the first place. Class mods are pointed toward particular purposes-one might enhance one type of weapon while also boosting certain skills related to that weapon, as well, while another class mod might be focused on increasing maximum health or shields. Class mods are items that greatly enhance the specific abilities of your character while offering some cool aesthetic customization.