River Salve

In roleplay, the Salve refers both to the physical river that runs north-south from Al Kharid all the way up to Paterdomus, where it goes underground, and also to the "salve barrier" of saradomnist power that prevents Zamorakian creatures from passing in and out of Morytania.

Roleplay Interpretation
The commonly accepted interpretation of the Salve barrier in Roleplay is that it is a powerful, invisible force-field that grows out of the blessed Salve river and envelops all of Morytania in a sort of dome. The power of this field has no effect on most beings, but those who are naturally, genetically predisposed to Saradomin's enemies (Zamorak and possibly Zaros) are physically incapable of passing the barrier. Most often, this applies to werewolves, vampires, and vampyres.

The reasoning for this interpretation is that, if the barrier were only literally on and above the Salve River, it could be easily circumnavigated. Vyrewatch could simply fly over it and everyone else would have no trouble at all getting around by boat. It's clearly visible in-game, however, that werewolves and vampyres are not invading Misthalin, so logically the Salve barrier is more difficult to pass than that, thus lending credibility to the dome theory.

Getting Around It
One way or another, you are going to come across a werewolf or a vampyre that has found a way onto the mainland. While this is typically frowned upon, there are provisions made that allow such characters to exist.

The Usual Theory
Most roleplayers approach the Salve problem on the premise that, at full strength, a creature of Zamorak cannot in any way pass through the barrier - not by force, not by persuasion, not by magic. Working with this, then, the obvious trick is to either decrease the strength of the barrier or decrease the effect of the barrier on you. Possible solutions, then, are:
 * Make the barrier less holy - corrupt it. For example, spill the blood of an innocent victim onto it.
 * Make yourself more holy - corrupt yourself. For example, a werewolf that went through the agonizing process of soaking in holy water might have an easier time passing through.
 * Add more!

Unusual Theories
None yet. Heard of a clever, lore-abiding idea on how to cross the salve? Add it here!

Side Effects
Crossing the salve once would be hard enough on a zamorakian creature. Knowing that, it only makes sense that repeated crossing of the salve would cause some serious damage. Just look at the General Store Owner in Canifis who deals with rare goods from Misthalin. After that much stress, you might suffer from...
 * Compulsive ticks
 * Weakness
 * Paranoia
 * Mental instability

Other Information
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