Sezzherei's Lair (Portal Gem)
From Drunkapedia
A gem that summons a portal to a dungeon that houses a Margul named Sezzherei. You can use the gem to go kill Sezzherei and obtain a quest helm with minor salvaging on it or alternatively the gem is required in order to complete the quest to get flagged for Vissidal Island.
Obtained by: Killing Fallen Creatures in VoD or on Caul. Drop rate is 100%.
Stack Size: Does not Stack