They heal at a specific rate. It just takes too long for you to get back so it heals a lot. A good bit of that would be tied to griefing. A lot of people would be doing slayer and kill (for example) a dragon and then leave it for someone else to kill, giving the first person half the slayer exps. I heard stories of people doing this and world hopping so that they got half the exps in multiple worlds. It was suppose to be a super fast way to get slayer exps. After a time jagex set it up so that if you did not kill it and it healed, you did not get the exps.
27-May-2023 16:49:58