Twin-Headed Hammer

This heavy warhammer has two striking heads, one decorated with intricate etchings resembling an ettin's face. When wielded by a creature with two heads, this weapon grants a +1 bonus to attack and damage rolls. Each time you hit a creature with this weapon, you may choose to make a second attack against the same creature using your bonus action. However, if you miss the second attack, the weapon deals 1d4 psychic damage to the wielder as the conflicting desires of both heads make it difficult to aim.