Comments

Comment by varenne

Remnant of the Blood Moon will spawn after draining the Blood Moon with Drained Blood Crystal to zero health.
Has a chance to drop Vial of Red Goo
Remnant coordinates 22.2, 50.8
Some videos:
Summon https://youtu.be/dgNF_COZDqU
Kill https://youtu.be/GjePdcpaHFo
Vial of Red Goo toy https://youtu.be/AGoSwBGlcAs

Comment by 976098

Drained blood crystals are found on the ground in the area around the Blood Moon. Each one removes 80 power from the blood moon.

Comment by Casn

Channel time on Drained Blood Crystal is a bit longer than it's cooldown. You only have to start channeling to deduct 'health pool' from Blood Moon, but you have to finish to get Glowing Blood Crystal.
However, you can click on Drained Blood Crystal as soon as CD is up, and you will still recieve your Glowing Blood Crystal seconds later as long as you are still channeling it.~6 seconds after starting.

Comment by 1490544

Drained Blood Crystal >>>>> https://youtu.be/H5h4sAyXZHg

Comment by Carboncopy666

It's worth noting that you cannot loot these while in combat.

Comment by kabeen

Disappears from your bags when leaving Tanaan Jungle...

Comment by Winning117

125 of these are required to drain the Blood Moon which turns into Remnant of the Blood Moon once drained. It's important to note that this boss can only be looted once per day. These can be found at the following 9 locations, forgive me if I missed some:
(22.8, 50.0)
(22.2, 51.3)
(22.0, 49.5)
(22.2, 49.5)
(22.0, 51.7)
(20.6, 50.7)
(20.7, 50.7)
(21.6, 52.7)
(21.6, 51.9)

Comment by xrobanx

Possible to stack them

Comment by chibiusako

As of 6.2.2, each cast only drains 12 health instead of 80.

Comment by Shakiz

Note: Do NOT move or jump while channeling. The crystal will be gone without draining any HP.

I hate Blizz for this damn rare.

Comment by thissucksMT

The Blood Moon, which has 10,000 hp at full health will need 833.333333 Drained Blood Crystals to get to zero. The Crystals drain 12 hp. Do not move your toon while you are draining the Blood Moon! I and about 5-6 other people knocked the health bar down from 8990 to 5200 in over 3 hours.

This really sucks! If you move in any way the draining stops and you lose the crystal. I found that out when I accidentally turned my toon instead of my camera to see if any hostiles were in my immediate area. So, DO NOT MOVE YOUR TOON while draining the moon! :)

You also cannot pick up crystal while you are being attacked or if your pet is attacking. There are crystal located all over that area. A few, that I've seen are located in the entrance to a few of the larger huts.

Good Luck! :)

Comment by smashfanDS

As of patch 6.2.2a, the event now starts with the Blood Moon having 1,000/10,000 HP. The shards still drain 12 each.

Also make sure you have at least 1 space in your bag while channeling, otherwise when it completes, you won't get Glowing Blood Crystal and WON'T cause damage to the Blood Moon.

As if channeling without having the mobs interrupt wasn't bad enough already. :(

Comment by Naenthos

So, reading the comments, apparently the amount of crystals it takes to drain the Blood Moon (which summons a massive blood monster) has altered a lot. I had never paid too much attention until now, well into Legion. But for fun I wanted to see how much crystals it took.

When I started (and I tried this today) the Blood Moon was almost full. So if it were full you may have to add 10, 20 maybe? I say maybe because when draining the very last of the Blood Moon the rate of decline slowed a lot so that may be the same at the start.

As I said, it was almost full and I was the only one there (as far as I'm aware at any rate). And it took me exactly 78 crystals to empty the Blood Moon completely. The most annoying thing was waiting for the crystals to respawn but it wasn't all that bad.

Comment by xexok

Just did this. It started at 1,000hp and was full. Each stone did take 12 damage off but it took me at least 5 stones to even make the hp drop any at the start. I may have been clicking them too fast as it still channels past the cooldown timer of 6 seconds, Let them finish just in case. It took me 88 stones to kill the blood moon which means it took around 1,056 damage. It was definitely slightly above 1k hp.

Comment by seirl

Since the 8.0 stat squish, the Blood Moon only has 85 hp, but Drained Blood Crystal only damage it for 1 HP now, so you still need 85 Drained Blood Crystal to kill it. Don't be fooled by the display bug of its health bar, it starts at only 9%.

Comment by Nellse

Took me 96 crystals today.

Comment by yusuf

Almost everything you may want to know about this Drained Blood Crystal as of patch 9.0.5:

You need a relatively large random number of it (very roughly 75) to summon Remnant of the Blood Moon under a non-targetable sphere called Blood Moon, which spawns randomly for its event, at coordinates 22.2, 50.5 of Tanaan Jungle, Draenor. Although you cannot target Blood Moon, you can still mouse over it to see its health. As of patch 9.0.5, it has 25 HP. It randomly takes from 1 to 6 Drained Blood Crystals to drain 1 HP from the Blood Moon. So, you probably need a bare minimum of 75 Drained Blood Crystals if you want to solo-drain Blood Moon while it's at its full HP of 25.

Important Note 1: It takes about 6 seconds, sometimes slightly longer, to finish the draining cast after you right-click Drained Blood Crystal. Be very careful and very patient here before right-clicking another Drained Blood Crystal, because although you can right-click a new one before the draining cast is complete, from my experimentation, it seems that this wastes the draining mechanism itself! So, in short, if you do not wait about 7 seconds — just to be sure — after each right-click on Drained Blood Crystal, you may waste its usefulness. So, make sure the cast bar is completely gone and then some before you right-click another one.

Important Note 2: If nobody else killed them recently, there should be 3 Bleeding Hollow Cabalists on the ground around the Blood Moon, channeling some sort of spell toward the Blood Moon. Although I cannot confirm this or be 100% certain of it, my testing gave me the impression that whatever those Bleeding Hollow Cabalists are doing may very well be protecting the Blood Moon from the draining spell that you cast on it via the Drained Blood Crystals. And if you're doing this at max level as of patch 9.0.5 or beyond, you can stand relatively close to those NPCs and they won't aggro. So, just to be on the safe side and not waste any of those Drained Blood Crystals that you farmed, make sure to kill any and all Bleeding Hollow Cabalists that spawn under the Blood Moon before you drain it with a Drained Blood Crystal. If you test this and can confirm that this is not the case and the Bleeding Hollow Cabalists are not protecting the Blood Moon from draining, please reply to this comment and if there are enough confirmations, I'll edit this comment; thank you.

Once you do bring the Blood Moon to 0 HP, Remnant of the Blood Moon spawns. It is almost insta-killed solo at max level as of patch 9.0.5. Remnant of the Blood Moon has a roughly 1-in-3 chance to drop the toy, Vial of Red Goo, and about a 1% chance of dropping various other Draenor pieces of gear, including blues/rares and shipyard equipment blueprints. And if it is marked by a double-sword relatively large icon on the map, then it is also guaranteed to drop 100 Oil.

Finally, after using a Drained Blood Crystal, the item that you get, Glowing Blood Crystal, is indeed trash that you can safely vendor.

Comment by Sunfox

As of Dragonflight with level reworks and whatnot, it took me 104 of these to do the Remnant of the Blood Moon rare solo today. Keep in mind they still disappear from your bag upon leaving Tanaan Jungle.

Comment by Amilee

As far as I can tell, it only sometimes drains 1 healthpoint, based on the Power of the Blood Moon UI. Even then it feels like a low chance of actually draining any health, when I started it had 32 health, after going through 54 crystals, it now has 11 health. Frankly this feels bugged after the stat and level squishes, but it's very unlikely to be fixed either.

Comment by ArticSkoll

seems as of 10.1 at time of this post it still is possible, my personal experience: 109 crystals used with the 109th finally spawning the blob to end the event.

for me the event started with the HP bar at about 4% at 49 ish hp out of 1000, seemed like every 3rd or 4th crystal used seemed to take the hp down by one point.

recieved the vial of red goo toy item post kill on the blob.

Comment by Metoda

UPDATED

You need to use Drained Blood Crystal near big red orb to summon Remnant of the Blood Moon

quick video guide:

https://youtu.be/Dw60ArpVfM0

Comment by bomigabster

Dragonflight 10.2.

IMPORTANT: IF YOU LEAVE THE ZONE, Drained Blood Crystal WILL DISAPPEAR FROM YOUR BAGS

These crystals are used to summon Remnant of the Blood Moon, which I did today. You will find them scattered around the mob's area, I've added some coords below.

When I first arrived the bar was sitting at 40/1000. I drained maybe 3 or 4 Drained Blood Crystal as I usually do on my way past, and then someone else showed up and drained a few before leaving, which is when I decided to actually spend time summoning the Remnant. At this point the bar was sitting at 35/40 so I am not sure exactly how many crystals it takes to do the summon from full 40 (which is what it's usually at when I am in the area) but 35 to 0 used 128 crystals so I'm guessing 150ish should be safe but looking at other comments it does seem to vary. I am also unsure if three or so of my crystals counted because even though it said 'draining', my character didn't do the draining animation.

I suggest grabbing extra crystals before starting the summon so you don't have to leave the area to grab more when the bar is sitting on 1 or 2 in case someone else comes along, throws a couple of crystals in, and kills the mob (at lvl 70 it's a one shot) you've just spent so much time working on summoning.

I think it took about half an hour to collect the crystals, I timed just standing there draining the crystals and that took a full 10 minutes (I'd allow 15 minutes if you're solo and starting at 40/1000). Do not interrupt the drain for any reason or your crystal is wasted, avoid moving/jumping, and I suggest killing the mobs that spawn there in between draining.

I have turned the Drained Blood Crystal coords from Winning117's comment into Tomtom waypoints below and added some of my own. I did not check the exact accuracy of Winning117's points but I did find crystals in the areas they gave. There are probably more crystals around, possibly in the lower camp area, but by the time I did a lap grabbing the ones below they had started spawning again so I didn't venture further to look for more.

/way 22.8 50.0
/way 22.2 51.3
/way 22.0 49.5
/way 22.2 49.5
/way 22.0 51.7
/way 20.6 50.7
/way 20.7, 50.7
/way 21.6 52.7
/way 21.6 51.9
/way 24.42 59.45
/way 22.15 47 73 two inside hut
/way 24.42 50.45
/way 20.42 49.72 in fire
/way 19.95 50.12 in bed
/way 19.78 51.27 next to orb
/way 25.46 46.70 there are 4 around the circle area
/way 25.13 45.69
/way 24.84 45.77 inside hut next to fire
/way 24.43 45.84
/way 23.64 46.46

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Drained Blood Crystal

Item Level 40
Tanaan Jungle
Binds when picked up

Use: Drains the Blood Moon and becomes a Glowing Blood Crystal. (5 Sec Cooldown)
Requires Level 35

Max Stack: 99

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6.2 Tanaan Jungle Guide

Drained Blood Crystal

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