The Sword of Might is an artifact from Heroes of Might and Magic V. It goes in the Weapon slot and it increases the hero's Attack skill by +2. The Sword can be purchased for 5,000 gold.
A basic weapon, it is not the best artifact to have, but still, a weapon nonetheless. For low-attack heroes (Ranger, Necromancer) it may be necessary in the early game, and extra attack (+10% damage) can be helpful at times. As a starting bonus it is quite ordinary, and more viable for might-oriented factions.