Alternate Blind Proposal #2

This proposal introduces three new amulets that cannot be taken off
except in safe areas (you can't switch between them out in the world).

* Hold Resistance amulet is dropped by the Lupogg King
* Purge Resistance amulet is dropped by the Orc Pit Boss
* Blind&Dazzle Resistance amulet is dropped by the Ghost

All three of these amulets resist their type of spell by 50%. The
Blind&Dazzle amulet cuts blind and dazzle durations in half, and does
not stack with EE. The Hold amulet cuts Hold durations in half, and does
not stack with FA. The Purge amulet cuts Purge chances in half when
worn, protecting your buffs. All three amulets inform the enemy that
they are working.

This proposal:

- Changes no existing spells at all
- Adds some interesting necklace options
- Adds some player choice as to which type of CC they want to resist
- Adds some adventure in pursuit of these items (boss monsters)

Ideally, these amulets would be obtainable from unique quests rather
than bosses, but that's a much larger pull.