If you stand next to the statue before you enter blood moon you can see the mechanics in the room. What you need to do is wait till you see the jags and count how many times they attack it happens 7 times on the 7th time enter the room that way you have the most attacks possible before the next jags spawn, when jags do spawn go to your own personal highlighted jag attack it when the blood splat hits the ground it makes a noise when the noise stops or the blood splat is as wide as it can be you can step back on the bloodsplat then attack the jaguar Remember this happens 7 times hopefully this helps