Gideon

Gideon is Diane's sacred treasure, and after her having lost it, was one of the two rewards for winning the Byzel Fight Festival.

Appearance
Gideon is a war hammer designed for a giant. It is as tall as Diane, and has, what appear to be cracks on its flat side. Gideon also includes a pommel on its other end.

Background
After the Seven Deadly Sins' disintegration, Diane lost Gideon for a yet unknown reason; it was later found in a valley, and then subsequently became one of the rewards for winning the Byzel Fight Festival. During the Holy Knights' attack on the Deadly Sins, a shrunken Diane was attacked by Marmas. After returning to her normal size, the giant, angered by the proceedings, especially Helbram's wounding of Meliodas, proceeded to unleash an attack, whose immense force forced Helbram, and his subordinates, to retreat.

Abilities
Gideon, like the other sacred treasures, fully draws out Diane's powers, allowing her to, with an immense amount of destructive force, obliterate the surrounding ground, and send a mountain-sized boulder high in the air.

Trivia

 * Gideon or Gedeon, which means "Destroyer," "Mighty warrior," or "Feller (of trees)" was, according to the Tanakh, a judge of the Hebrews.
 * It is the second sacred treasure to be revealed in the series.