Strange Oceanic Sediment - World of Warcraft item

About Strange Oceanic Sediment

This item is a zone-drop in Nazjatar. The Strange Oceanic Sediment is one of the items used in the Mardivas's Laboratory (60.31 30.52), along with Strange Mineralized Water and Strange Volcanic Rock.

Normally, if the laboratory is activated, the player has to fight an Arcane Amalgamation. However, in the laboratory there is also a Lesser Arcanocrystal and a Greater Arcanocrystal, which can be used with the Arcane Reagents to summon other mobs, each dropping different items. Since the options include using either the Lesser Arcanocrystal with a Reagent or using Reagents with both of them, there are a total of 13 viable combinations.

All of the mobs need to be defeated at least once to complete the achievement – Periodic Destruction, which is a pre-requisite for the achievement – Undersea Usurper, a reward of which include a mount, Snapback Scuttler. Since the quest can only be done once a week, it takes a minimum of 13 weeks to complete the achievement.