Ragnell

Ragnell is the name of Ike's ultimate weapon in Fire Emblem: Path of Radiance and Fire Emblem: Radiant Dawn.

The weapon itself is a large golden sword with great power and accuracy. Ragnell was blessed by the goddess Ashera, making the blade unbreakable. In the storyline, Ike uses Ragnell to penetrate the blessed armor of the Black Knight during their duel. Early on in the game, Ragnell was offered to Ike's Father, Greil, by the Black Knight just before their duel. Greil however, refused the blade and fought with his axe, only to be mortally wounded in the aftermath. In both games set in Tellius, the Ragnell is given to Ike as part of the main storyline.

In Super Smash Bros. Brawl
Ragnell is also featured as Ike's weapon in the Wii game: Super Smash Brothers: Brawl. With it he could perform his signature Aether attack. It also had magical fire properties, much like Roy's Sword of Seals, even though such powers were never seen in either Fire Emblem game. Later on in the game Ike give Ragnell to Begnion as a "sacred treasure"