The Nebiros is an enemy from Final Fantasy X. It is encountered in the Calm Lands. When fighting against a Nebiros, it is best to either bring in Wakka or another party member with high Accuracy. It is also weak to Ice, so Lulu's Ice magic works well.
Nebiros will drop armor with Poison Ward and Weapons with any of the elemental strikes as well as Strength/Magic +3% bonuses.