Bres

According to Maerista, "The Book of the Black Cow":

• Son of Elathan, more warrior like than the latter
• Became known as Balor after being corrupted and mutated by Kadath (making a deal that he would get lots of powers for the price of Breo Saighead's life)
• Gets mutated: two more arms, they double size, becomes Balor "of the many blows". Poison gets into his eyes becoming green and everyone who looks at them becomes petrified
• Petrifies his father
• Loses one arm and one eye to Setanta
• Cured to normal by Manannan mac Lir
• Stays with Breo Saighead at Mag Mell