Quote Originally Posted by Strill View Post
So it's not worth using in combat if you already have a magic weapon. Good to know.
In actual play its one of the strongest boosts in the game. Most combats don't start in melee range, nor is it all that profitable to dash at enemies and get no attacks. So in many cases, it doesn't actually cost you an action in terms of losing attacks, take your move and than power up your sword.

Remember that the bonus stacks, and does not replace the bonus for a magic sword, so if the combat lasts more than 2 rounds, it will be better to use the boost than not to. Unlike the vengeance ability it stacks with advantage, and a +5 bonus is worth more than advantage most of the time.