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Comment by hooda100mu

This or related items like
strange mineralized water
strange oceanic sediment

These are part of your weekly quest that awards rep . This can be started with a short questline . Players may come across lesser benethic arcanocrystal from opening treasures. If a player receives this item, they will be directed to a cave in Azshari Terrace at (60,32) called Mardivas's Laboratory. Upon turning in the quest, players can then pick up a quest where they must defeat an elemental amalgamation. Once the amalgamation has been defeated, players can then pick up the quest the laboratory of mardivas where they must empower either a lesser Arcanocrystal, greater Arcanocrystal, or both and then defeat an enemy.

Some of this content i found in a guide here

Comment by artix

The entrance to the cave is from the pool-side located at 60,28.

Comment by Whippr

I got one from Cleverly Concealed Supplies, which was the reward for completing Anytime You Need A Friend, but I did not get a new quest to go to the lab. I went there anyway but couldn't find anything to interact with so I'm not sure what to do with this.

Comment by Jovio

I would say 60, 31, more closely. The 60,28 lead me to a summoner of sorts, that had loads of elementals, and as a squishy priest, I was squished...

Comment by Cetex1337

I have already collected 11 different Strange items (in 5 days time) but i can only use one per week? Seems silly.

Comment by Phalock

I was very confused about how this whole system worked until I found Neryssa’s comment.

TLDR: If you've already completed The Laboratory of Mardivas for the week, you won't be able to use the Arcane Reagents to do anything inside Mad Mardivas's Laboratory.

Longer explanation: once you have unlocked Mad Mardivas’s Laboratory, you will find a weekly quest (The Laboratory of Mardivas). If you just do the quest in its most straightforward form, you will spawn Arcane Amalgamation. However, if you wish, you may use Arcane Reagents (Strange Mineralized Water, Strange Volcanic Rock, Strange Oceanic Sediment) to empower either one Lesser Arcanocrystal OR one Lesser Arcanocrystal and one Greater Arcanocrystal. Different mobs will spawn depending on which Arcanocrystal(s) you empower, and different mobs can drop different loot. Defeating the mob spawned by every possible combination is the point of the achievement Periodic Destruction. (Incidentally, this will take a minimum of 13 weeks to complete, but some of these mobs are rather hard to kill if the comments on their individual Wowhead pages are to be believed.)

One other tip: Arcane Reagents are not soulbound, so keep them all on your bank alt until you're ready to use one or two on reset day.

Comment by Kimma

I used 2 of these to summon Osgen. I choose both lesser and greater Benthic Arcanocrystals (the blue ones).

Comment by Lucetia2896

This achievement is a part of the meta Undersea Usurper. You use need the below items in conjunction with crystals to spawn the below mobs using the following combinations.

Coordinates to the cave are: /way Nazjatar 60.31 30.52 Mardivas's Laboratory

The mobs for The Laboratory of Mardivas seem to drop ~2-3 Prismatic Manapearl and the final quest turn in giving 5 Prismatic Manapearl. If you are unsure if you have done it this week you can copy and paste this into your chat log. If "true" is returned it has been completed. If it states "false" then the quest hasn't been done. /script print(IsQuestFlaggedCompleted(55121))

Lesser Benthic Arcanocrystal and Greater Benthic Arcanocrystal requires Strange Mineralized Water each.
Lesser Lithic Arcanocrystal and Greater Lithic Arcanocrystal requires Strange Oceanic Sediment each.
Lesser Pyroclasmic Arcanocrystal and Greater Pyroclasmic Arcanocrystal requires Strange Volcanic Rock each.

Lesser Arcanocrystal	Greater Arcanocrystal	Spawn
None	None	Arcane Amalgamation
Lesser Benthic Arcanocrystal	None	Watery Amalgamation
Lesser Benthic Arcanocrystal	Greater Benthic Arcanocrystal	Osgen
Lesser Benthic Arcanocrystal	Greater Lithic Arcanocrystal	Zomera
Lesser Benthic Arcanocrystal	Greater Pyroclasmic Arcanocrystal	Omus
Lesser Lithic Arcanocrystal	None	Dusty Amalgamation
Lesser Lithic Arcanocrystal	Greater Benthic Arcanocrystal	Spawn of Salgos
Lesser Lithic Arcanocrystal	Greater Lithic Arcanocrystal	Herald of Salgos
Lesser Lithic Arcanocrystal	Greater Pyroclasmic Arcanocrystal	Salgos the Eternal
Lesser Pyroclasmic Arcanocrystal	None	Burning Amalgamation
Lesser Pyroclasmic Arcanocrystal	Greater Benthic Arcanocrystal	Xue
Lesser Pyroclasmic Arcanocrystal	Greater Lithic Arcanocrystal	Moghiea
Lesser Pyroclasmic Arcanocrystal	Greater Pyroclasmic Arcanocrystal	Ungormath

Comment by Kaerfemagsh

how do you use this? when i got to do the weekly, i cant interact with the benthic, pyroclastic or lithic crystals at all, even though i have several of each reagent; i can only interact with the pedestal at the end

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Strange Mineralized Water

Arcane Reagent
Item Level 1

"Bring to a Benthic Arcanocrystal to charge it, empowering the Elemental Essence Amalgamator with the power of water."

Max Stack: 20

Sell Price: 10

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Strange Mineralized Water

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