Enhanced Armament

A weapon you touch is preternaturally strengthened, making it pack an extra wallop. For the duration, when the weapon deals damage, it cannot roll under half of its damage die's maximum. So a shortsword strengthened by this spell could not roll less than a 3 for damage, treating a 1 and a 2 in this case as an automatic 3.

This only affects the weapon's base damage die, not damage granted by a spell or class feature (such as smite spells or the smite ability). It does, however, affect the damage of innate enchantments, such as the flames of a flame tongue.