A great mithril axe
From Ancient Anguish Mud Wiki - AAwiki
From Manspider's area go w, s into the river. then swim e until u see a "ne" then swim ne, swim e, dive. u are now in the lower part of this area. (u can drown down here if u stay in the water too long). There are a couple of places that the big zombie guy with the axe can show up.
1st place: from "dive" go swim s, swim all e, search debris or rubbish. Swim n (i think) from zombie and climb ledge for a safe area where u wont drown.
2nd place: from"dive" go swim s,swim all w, swim s, search debris.
The mithril caves is a pain if you cannot breath air , i would suggest if your lucky to get one of Pris's random water breathing items or pushing the block in ordainer area to get jade ring , this allows water breathing for a certain amount of time making killing the zombie leader far easier,