Fragarach - steel broadsword CG (lawful or neutral creatures take damage and are stunned when they pick it up, CN can use it, but only 1 hit/rd), for CG, automatically hits anyone who has hit the wielder, otherwise a +4, always strikes last in a round. against evil opponents, on a rolled 20 (this was before critcal hits) the damage bonus is +8, set with 7 perfect emeralds, and highly decorative scabbard - worth 90,000 gp.
other swords of answering (Rebuter, Scather, Replier, Retorter, Squelcher, Back-Talker) alignment varied, only +2 weapons, +4 damage on critical, no other powers - also set with stones, etc. - 50,000 gp
elemental power gems - one of each element, fit into the Orb of Golden Death - way evil artifact. possessor of Orb instinctively knows how to operate the Great Throne in the Temple (and some other powers). each elemental gem had to be found in the same type of elemental node and could conjure an elemental (according to type) cast a spell and summon a demon. --air: wind walk/Babau, earth: earthquake/Type I, fire: flame strike/Type II, water: wall of ice/Type III
that's a quick run down...