both the +5 axe (Axe of the Unyealding) and the +6 halberd (The Ravager) are also vorpal weapons with a 10% chance to instanly kill the enemy. the axe does allow a save vs. death though, but the halberd doesn't!
avoid having the person wielding the Ravager being charmed, confused or dominated!!!

I learnt that the hard way...