You find them by going into rooms in missions. If you go into the right room in the right mission they appear. If anyone finds one, their location is revealed for a short time until they appear.
As for the ass-kicking, yeah, probably.
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How many are there? Will it take the community five minutes to slaughter them all? I'm on Xbone
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It usually takes a few days. They have a lot of health and can one-shot you with weak mods.
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Yikes. What do they drop? Please tell me it's some Stalker themed weapons.
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Exclusive event mods. One extends your melee counter. The other lets it continue to build. There is also a slew of headshots do more damage when aimed with a certain weapon type.
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Good enough lol