So I just ran MoTW for the first time today.

So I just ran MoTW for the first time today.

So I just ran MoTW for the first time today. And I’m a bit confused. I did Damn Dirty Apes from the back. It kinda seemed like it would have been impossible for the hunters to actually kill Koko, it had so much health. Also what does vulnerable mean in the context of a weakness? Did I miss something?