Borios - man found and slew on island we washed up on

Sorcerer who serves Vecna Lier Had statue under his home that Tam was able to translate:   "To Stop...advance, top arcanists...Shatterstar. Plans are...Fangrest"   Previous owner of cursed staff   Was maintaining the Blue Rhino Ship   Killed all of the islanders through betrayal and poisoning.   Spoke of our island as a pirate hub and mining operation before they turned on each other.