The lore was true. Those who've spoken to Nigel knows what's to come. It's time to become either a Hunter, or Hunted.
When you kill an enemy in level 5 Wilderness onward, there is a rare chance of the corpse yielding a Blood Key - a cursed, chaos-imbued key leading to great treasure. But beware! Picking up the key is subject to the curse: You shall not teleport. You shall be skulled. You shall be placed in spotlight. You shall take multiple enemies, wherever.
Once you take the key, your goal is to make it out of the Wilderness. However, since you're Teleblocked from the moment you take it, life becomes rather difficult. On top of that, you're skulled, and you're considered in a multiway-combat zone until you escape. Meaning you have two options: wait out the (half-time) Teleblock, or walk south. Far south.