To tame a reaper should select the reaper queen wanted and trap it in a stone 5 by 7 trap surrounded by pillars and close I up with railing then activate a charge lantern to weaken it and damage it with a ballista turrent intill it's under 2000 health and then you should turn of the light, lead it to the back of the trap to be impregnated (to know if it's ready for impregnation you will see a red glow around the neck, if the PILLARS ARE BLOCKING THE TAIL FRM IMPREGNATING YOU YOU SHOULD go to the back and break the pillars so it can sniff you and impregnate)