This npc is no longer available in game.
Large Vile Slime was removed from the game in Patch 4.0.3a. It was purportedly the only known ooze-type aberration with a mana bar (for casting Crimson Fury). Until Patch 1.7.0, it included Timolain's Phylactery in its loot table. Player speculation at the time thought it related to a mage of the same name and his alleged role in creating Ashbringer. (It was later revealed that Magni Bronzebeard crafted the blade, however.)
For the namesake mob that is involved in acquiring the Corrupted Remembrance skin for Ashbringer (artifact weapon), visit Large Vile Slime.