Eoin Qualtrough, Avatar of Crom Cruach

Nature is but one vast reservoir of life and matter in which nothing is lost and nothing dies, no matter how forms may change.

~ Kirpal Singh

Eoin, once a Scion of Mannanan Mac Lir has now become an Avatar of the Pale Worm, Crom Cruac, presumably as a result of his self-sacrifice on Vlodimir's Hill, under the belief that this would delay the rising of the Titan, as suggested to him by Red Jenny.
Eoin was apparently destroyed in a conflict with the Scions and Baldur during which he tore the arms off the Norse God, and was reduced to charred bones by the subsequent manifestation of the Glory.