Yngvi Choker

Cannot be auctioned, traded, bazaared, or delivered.
Cannot be obtained as a random reward from the Gobbie Mystery Box Special Dial and similar sources.

In Norse mythology, Yngvi, alternatively spelled Yngve, was the progenitor of the Yngling lineage, a legendary dynasty of Swedish kings, from whom also the earliest historical Norwegian kings claimed to be descended. Yngvi is a name of the god Freyr, perhaps Freyr's true name, as freyr means 'lord' and has probably evolved from a common invocation of the god.

Ingvi-Freyr's subjects loved him greatly, and he was "blessed by good seasons like his father," which would explain the -enmity and regen stats of this item (Wikipedia).