In the fictional Warcraft Universe, the Knights of the Silver Hand (often abbreviated to the Silver Hand) is a knightly Order created after the First War by a paladin called Sir Uther Lightbringer. The Three Graces, here in a painting by Sandro Botticelli, were the goddesses of charm, beauty, nature, human creativity and fertility in Greek mythology. ... Map of the planet Azeroth as it appears in the game World of Warcraft (Note: The map does not include the continent of Northrend at the north pole as it is not a reachable area within World of Warcraft) The Warcraft Universe is a fictional universe in which the Warcraft... Roland is girt with a sword by Charlemagne; from a manuscript of a chanson de geste. ... Uther the Lightbringer is a fictional hero in Blizzards Warcraft universe. ...

The former Order, which was called the Holy Order of Northshire Clerics, was devastated during the First War when most of their clerics were slain. And Uther, who was the apprentice of the aged Archbishop Alonsus Faol, was so devoted in defeating the Orcs he rebuilt the Order and named it the Knights of the Silver Hand. In Christianity, an archbishop is an elevated bishop heading a diocese of particular importance due to either its size, history, or both, called an archdiocese. ... The Orcs are one of the races in the Warcraft Universe — a fictional universe where a set of games and books are set. ...

Uther Lightbringer founded the order before the Alliance launched the Second War. The paladins were instrumental in winning the war, and actually helped the Holy Light catch on with the citizenry in Azeroth when people saw the mighty paladins do battle with their holy power. In recent years, the Knights of the Silver Hand entered a dark period when one of their own, Prince Arthas, turned his back on the order in his dark pursuit of vengance. He fully embraced the evil he thought he was hunting and became a death knight in the service of the Scourge. Even after the triumph at Mount Hyjal, the paladins remember Arthas's betrayal. Many paladins feel responsibility for him, because the Holy Light teaches that every person can strengthen other people. Since they were unable to strengthen Arthas, the entire world suffered. Uther the Lightbringer is a fictional hero in Blizzards Warcraft universe. ... Holy Light in World of Warcraft The Holy Light is not a religion. ... A scourge (from the Italian scoriada, ultimately from the Latin excoriare [to flay] and corium [skin]), comprises a whip or lash, especially one used for the infliction of corporal punishment. ... Mount Hyjal Mount Hyjal is a fictional mountain found in the fantasy Warcraft Universe. ...

On the other hand, some priests use Arthas as a textbook example of the power of the Holy Light. Arthas is proof of a single person's power to affect the universe in good or evil ways. The remaining knights hunt Arthas's servants, the undead, with a ruthlessness that frightens some, but they are determined to fix their mistakes.

From: World of Warcraft The Role Playing Game 2005

The whole 'Silver Hand' thing is an inside joke. It refers to the metal gauntlet shaped pointer the Human Campaign uses to direct troops, actions, etc.