Just for kicks, SoH 1d20 + 3 ⇒ (3) + 3 = 6 Can I add the mace to inventory? We're going to find our stuff soon anyways right?
Having no luck, Thunk continues his search. Looking around the room he checks for anything to help the group. Defeated, he slumps his head and arms. "Thunk have no luck." feeling defeated, his anger starts to well up. The people were nice enough, but Thunk didn't like feeling powerless. With his blood boiling at the situation, he storms back over to the guard, (raging for one round) and brings the mace down on the sleeping brute.
Attack 1d20 + 6 ⇒ (13) + 6 = 19
Damage1d6 + 5 ⇒ (4) + 5 = 9 or 1d8 + 5 ⇒ (8) + 5 = 13 Depending on if it's light mace or heavy
"WAKE UP!!"