Alternate Oolacile Quest

Note: has to be done before getting the Lordvessel.
 * Visit the Grave of Artorias and defeat the boss that awaits there for the Silver Pendant.
 * Trade the Silver Pendant to Snuggly the Crow for the Broken Pendant.
 * Take the usual DLC entrance in the basin. (Dusk must be rescued by beating the Moonlight Butterfly / Walking Bastion bossfight.)
 * Optional: Revisit the Grave of Artorias after completing and leaving the DLC for a special fight.
 * Revisit the DLC later to explore the rest of it, working backwards.
 * In the pool area where you normally fight Sanctuary Guardian is a new boss, unlocked by killing 5 humans.