For 10 points, name this Celtic sun god and father of Cuchullain.
Before slaying an opponent, one figure with this name hopped around the enemy's army on one foot with one eye closed to imitate them. A cognate figure with this name is born when his mother steps over a wand to prove she is a virgin, but fails the test and spontaneously gives birth. In that myth system, he can only be killed if a spear hits him while he has one foot on a goat and one foot in a bathtub, in which state he is betrayed by his wife Blodeuedd. This god's mother, Ethlinn, was sealed in a crystal tower to prevent him from being born, but his father Cian still crept in. He is known as "skilled in many arts" and used a sling to defeat his one-eyed grandfather, the Fomorian Balor, at the Battle of Magh Tuireadh. For 10 points, name this Celtic sun god and father of Cuchullain.
Before slaying an opponent, one figure with this name hopped around the enemy's army on one foot with one eye closed to imitate them.
Lugh [or Lleu Llaw Gyffes, the Welsh equivalent]