Our party recently ran up against a Mithril Golem and we had a difficult time damaging it. Although our party (and the adventure) are high level (all 6 party members are 19th level) the golem specs, according to the DM, were that it could only be damaged by epic weapons. No one at the table could really define "epic weapon". There are crystals and scarabs that can overcome the golem's damage reduction, but what makes a weapon an "epic weapon"?