From Guild Wars 2 Wiki
Gravewater Ooze is a trophy required for the The Juggernaut III: The Colossus legendary weapon collection.“
Hint: Coat yourself with your Mystic Chromatic Ooze and take damage in Tequatl's watery grave.
— In-game description
- Use the Mystic Chromatic Ooze and enter the Watery Grave beneath the beach at Splintered Coast. You can either do this:
- During the fight with Tequatl by being hit by one of his melee AoE attacks, launched when Tequatl flies away at 75%, 50% and 25% (Tequatl is often stunned at 50% and 25% preventing it from using the attack).
- After the fight by interacting with the Watery Grave portal to the west of the chest in the water (by the Krewe Researcher, on the face of a cliff).
- This item does not enter your inventory. It is added directly to the collection.