Kjarr Crest Stream is a Lance Weapon in Monster Hunter World (MHW). All weapons have unique properties relating to their Attack Power, Elemental Damage and various different looks. Please see Weapon Mechanics to fully understand the depth of your Hunter Arsenal.
Kjarr Crest Stream Information
Kjarr Crest Stream Crafting and Upgrades
Kjarr Crest Stream is a special Lance weapon that can only be obtained through "The Fury of El Dorado" Kulve Taroth Siege Event quest, and cannot be upgraded. Kjarr weapons are "Incandescent" weapons that are obtained by triggering AT Kulve Taroth's "Fury" mode.