Eldritch Eye (Thaumcraft 4)

The Eldritch Eye is an item added by Thaumcraft 4. It is the key to enter the Outer Lands. In order to obtain the first eye, several Eldritch Guardians need to be killed for it to be dropped. By scanning it and completing the research, the player can then craft it using the Infusion Altar. Four of them need to be placed on an Eldritch Altar and the node must be right-clicked on (requiring 100 points of Vis per aspect) to create a portal to the Outer Lands.