Cleansing

The title of the quest is untranslated as of the 15 March 2023 patch.
Arkhara wants to get rid of all the Grabber and Star anomalies in the Zone, a total of 50, with the help of the Black Hole artifact you've found in the Stash of the "Monolith".
== Walkthrough ==
As a start, Arkhara gives you Black Energy ×20, but you will have to obtain the rest of the artifacts on your own. Each annihilation will consume Black Energy ×2, so you'll need 80 more. The most abundant source is the merchants: Sakharov sells 10 per day, Professor Lutsenko sells another 10, and Docent Zagorsky sells 5 (You will need to wait for 4 in game days to get your black energy artifacts).
To annihilate an anomaly, drop the Black Hole into it. The artifact itself won't be consumed, and you will be able to pick it up afterwards. Each time you do this, you'll get a message with the counter (see the #Bugs section, however).
Many Grabbers and Stars are shown on the interactive maps in this wiki; refer to the Locations page.
See also the video below for the locations of 54 anomalies.
* 1:44 Agroprom (1 total)
* 2:00 Army Warehouses (1)
* 2:14 ATP (3)
* 2:57 Swamps (7 total, 1 not shown)
* 4:21 Generators (6)
* 5:43 Forgotten Forest (4)
* 6:44 Zaton (6, 1 not shown)
* 8:22 Cordon (2)
* 8:52 Labyrinth (5)
* 10:35 Dead City (5)
* 11:53 Undiscovered Land (5)
* 13:29 Pripyat Dungeons (1)
* 15:02 Dump (1)
* 15:17 Old Village (3)
* 16:05 Dark Valley (2)
* 16:37 Central Pripyat (1)
* 16:53 Yantar (2)
== Notes ==
* Don't worry if you removed some of the anomalies before accepting the quest, as they still count towards the goal of 50.
* After removing 51 of them, you'll get the Sweeper achievement.
* There are more anomalies in Chernobyl-1 (17), Radar (3), and CNPP-2 (1), not shown on the video above. That makes for 70 total. 
== Bugs ==
* The counter message doesn't take into account the anomalies that might have been removed before accepting the quest, but they actually count towards it, so it's possible to complete the objective before it reaches 50.
* In the message you get from Arkhara when you take this quest, he offers you "two dozens" Black Energy artifacts (which are 24 pieces), but you get only 20.