Blue Hinox Horn
Blue Hinox Horn is a material found in Tears of the Kingdom.
Tears of the Kingdom
"This mean-looking horn is wrapped in hard chains. Attach it to a weapon to moderately increase attack power, or cook it with a critter to make an elixir."
Blue Hinox Horns can be obtained by defeating a Blue Hinox, which can be found scattered in locations across Hyrule and the Depths. They have a fuse attack power of 19, and make blunt weapons when fused. Merchants and shops pay 35 rupees per Blue Hinox Horn.
They can also be used in cooking elixirs, which increment Link's stats for a period of time. However, they do not contribute anything special or unusual to the result - increasing the effect duration of an elixir by only an average-level 40 seconds per horn.
Blue Hinox Horns are not used in any armor upgrades, nor are they required for any quests.
Default Tears of the Kingdom Hyrule Compendium picture