Warhammer

The Warhammer works in much the same way as Excalibur does, except without the penalty of a slow swing. Instead of knocking opponents down however, it knocks them back, buying you a little breathing room between swings.

You can grab it either during or after the Goblin Pirate attack. The Warhammer can prove useful during that fight however, as the knockback can push Goblins into bombs that you previously pushed away.