Summoning forth the darkness within, Mithuth activates his Aura of Pain, then closes the distance to the nearest orc, and swings a blow with his mighty sword.
Swift action for Aura of Pain. Enemies within a 15ft radius take 2d6 ⇒ (4, 5) = 9 Shadow damage(DC 17 Will for half), as does Mithuth. However, thanks to the Skullshield archetype, he actually heals from shadow damage.
1d20 + 14 ⇒ (5) + 14 = 19 Attack for 1d10 + 9 ⇒ (5) + 9 = 14