Charge exp for linking

Would limit the overpoweredness of teleportation. Would need to be configurable for each individual link type. Likely exclude Star Fissures to prevent accidental entrapment.

It may be valuable to allow configuration of overworld links to avoid entrapment, for instance if linking to a void age without enough exp to link back.

Could allow for overworld and/or all links to overcharge to avoid entrapment. For instance, if links cost 1 level and the player has half a level worth of exp, simply reset them to zero and allow the link regardless.