Weapon Bless

The caster imbues their weapon with great power against a single specific foe, whose name is inscribed on the weapon itself.

When they face that foe in battle, they gain a +10 bonus to hit on their first attack and do +10 damage on that first attack if successful. Additionally, if they roll a 1, they may reroll; they must take the second roll, however.

After that first blow, the magic begins to fade. For five turns afterwards, the caster gains a +1 bonus to hit and damage against that creature.

If the weapon is used against another creature before it has a chance to strike at its named foe, the spell ends without any effect.