Aureola

Aureola, called the Supreme Light, is the name of one of the eight Divine Weapons, and is the foremost light magic. It was created during The Scouring for use against Manaketes. It was first used by St. Elimine, then 980 years after that, by the Archsage Athos in the events of Fire Emblem: Rekka no Ken.

After the scouring, Aureola was sealed inside a temple in Etruria by the Eight Heroes. During the incident with Nergal, the seal was broken so that the magic might be used against Nergal, who had become mostly resistant to normal weaponry. After the incident, and the death of Athos, it was returned to Etruria, where the Etrurian Church guarded it until Roy drove out Bern from Etruria. At this point it passed into the hands of Roy's army for use against the Idenn's Manaketes. It is unknown what happened to Aureola afterwards.

In Rekka no Ken, there exists a stronger Light spell stat-wise, Luce; however, Aureola is better with the fact that its damage triples against Nergal and dragons, whereas Luce does not. Both are S-ranked spells.

Stats
Weapon Type: Light Magic Weapon Rank: S Range: 1-2 Mt: 15 Hit: 90 Crt: 5 Wt: 9 (14 in Rekka no Ken) Use: 20 Cost: N/A Effects: Res +5 when equipped, triple damage to Dragons (and Nergal)