"Black Angel"

Sakharov's promised reward for delivering the treatises lies with Wolf in Army Warehouses, but Wolf is unwilling to give up this advanced suit of armor without a Black Angel artifact for his sick daughter.
The artifact has already been spotted in Radar's Rusty Forest, so all you have to do is pick it up. However, Wolf warns that this artifact is radioactive and rumored to be attracting mutants.
Additionally, Wolf wants you to bring the weapon from his stash he made in the Rusty Forest, near the chopper.
This quest involves a huge mutant massacre. 
Parts of this quest are unmarked.
== Walkthrough ==
=== Rusty Forest ===
The flavor text about the Black Angel attracting mutants appears to be more than just a fairy tale. Upon stepping into the forest, you'll be met by a huge horde of various mutants, with a dozen Chimeras, three Librarians, and a bunch of smaller mutants. This horde follows the rules of large scripted mutant battles.
The Black Angel itself will be sitting around the southwest section of the forest.
Upon picking the artifact up, four more mutant waves will spawn:
* Red pseudogiant fighting a small pack of dogs.
* Two leaping pseudogiants, a large pack of zombies, including one exploder and one mosquito zombie, and the pyro-controller who is the most dangerous mutant in the wave. They all spawn in a tight cluster initially, so an anomalous grenade should solve this problem.
* Megapseudogiant and a huge number of snork variations.
* Giant mutant bear, two leaping pseudogiants, two inferno bloodsuckers, and another huge pack of anomalous chimeras. The giant mutant bear's audio tell for its stomp attack is much more difficult to pick out compared to a pseudogiant's, and the animation is faster as well.
=== Wolf's gun ===
After these waves have been dealt with, you can search the forest for the stash with the weapon Wolf requested you to return to him. The stash is spawned randomly on top of one of the rock formations around the [ crashed helicopter], such as the one on the picture.
(Note - do not sell or stash this gun away. You will need to give it away in a quest down the storyline.)
=== Back to Army Warehouses ===
Take the artifact back to Wolf. He will thank you and direct you to his stash in the north of the Army Warehouses for your reward. He warns that it's guarded by a pack of dogs which are, apparently, "almost tame"; so you should take a couple of sausages with you, drop it on the ground, and they'll let you pass - just keep your gun holstered.
=== Reward stash ===
Head towards the [ nothern farmstead]; you could hear the dogs from afar. The part about the sausages was of course complete bullshit, and some 40 dogs will want to chew you to bits, as well as your sausages. Additionally, there are 6 Monolith tanks to the north of the farmstead. 
The stash can be found in the dog lair to the north of the village, behind the bush. Look for a bunch of human remains.
The stash is empty except for a note from Devotee saying he'll return the armor soon. You'll need to see him in Cordon for your reward.
Picking this stash up triggers the enemy evolution, a major event in the game. Certain enemies in the game will evolve, especially Monolith. You will start encountering Monolith tanks, M60 machine gunners and VSSK snipers in the places where the ordinary Monolithians used to spawn. Their armor and weapons are much better, but the loot is more expensive as well.
== Notes ==
* This quest probably needs to be prepared to. Electrica grenades can wipe an entire wave in one throw. "Typhoon" Turret will also work, but will probably choke on the large amounts of flies, and have other troubles like being tossed around by pseudogiants or destroyed by pyro-chimeras explosive strikeback.
* A hard-hitting shotgun with a high rate of fire will be good for taking care of large, high priority targets like the giant mutant bear. Melee weapons could perform a similar function, but running into a gigantic pack of mutants will likely be a bigger risk than is necessary.
* There is a large "safe spot" in the south of the forest where mutants cannot normally path. It has rocky texture instead of the regular ground. You'll be safe from melee mutants here, but jumping and ranged attacks can still reach you. With good positioning, you can create a "mosh pit" to the north of this safe zone where mutants will gather and be excellent fodder for grenades or even anomaly capsules.
* An even safer spot is the rocks next to the entrance to Warlab, accessed from out of bounds. Running there after picking up the Black Angel will require some routing to avoid mutants as well as running through heavy radiation with an already extremely radioactive inventory.
* You may or may not want to take an artifact container for the Black Angel since it emits +75Ci radiation. The single-artifact container will entirely negate this.
== Bugs ==
* If you head to the safespot too early after picking up the Black Angel, mutants will attempt to approach from above it on the plateau. They will either become stuck up there or lunge down at you, making life difficult.
* The dogs at Wolf's reward appear to despawn almost immediately after leaving their online radius.