So way back when, King of the Fomorians Balor of the Evil Eye learned he would be killed by his grandson. Balor imprisoned his only daughter in his fortress on Tory Island to stymie such fate. MacKineely went to Tory to retrieve a stolen cow, came across young Eithne and … 3 sons ensued. Balor ordered them drowned but Lugh survived. Increasingly long story short, Lugh pierced Balors eye with a red spear spilling a fiery liquid to the ground which blasted out the Poisoned Glen
they sound like a fun family!