If you plan on battling reaper king, have a decent mount that can tank and possess an AoE attack/push back attack. Killed one on a Spino in 3 minute. Smaller animal will get killed easily. Difficulty 6 server setting for reference and vanilla stat modifier.
I heard that these guys were based off of the Xenomorphs from the Alien franchise, and it definitely makes sense. Get impregnated by a queen, have a horrifying chestburster emerge and try to kill you? Seems pretty familiar!
Since i cant find this anywhere. Reapers take reduced damage naturally so its a good soaker. Dont bring light pets near theese because they take more damage and deal less damage.The reaper burns when light is near it. Nameless will attack it tho. Sorry for bad english.
-if you want a reaper, you need to venture into the depths of aberration. Then, you need to lower the reaper queens health down to 2000. Once you do that, she will glow red, Go near her and you will be impregnated, then, you have a certain amount of time to gather until the reaper king BURSTS out of your chest. Then, make sure it has something to kill, and make sure you have LOTS of food, so you must be aware of that. Those are my tips, hope you have a nice time getting one of the beasts!