To tame a reaper king/queen, you need to attack a reaper queen(reaper kings will not work) until she’s is low hp. After that, she will sting you with her tail that will make you pregnant. After you wait a good amount of time, the baby will burst out of your chest. The only way to claim de baby, you need to eat reaper pheromones glands that drops from reapers. Good luck survivors!