Leviathan Trophy trophy_leviathan_eye

What it is for

Loot: exists to be sold or used in a recipe.

Sells to an NPC for about 1,062,985 gold. Weighs 20 of your carry capacity — and weight is what stops drops once the bag fills up.

The best source is Leviathan, at 8.0% per kill. You can farm it at Leviathan's Eye.