When an evil cleric activates their "turn undead" mode, if there are paladins nearby, they end up turning them just like a good cleric turns evil undead. Play an evil party, get Viconia up to a good high level, then go get Keldorn. Have her turn undead, and watch the fireworks. I haven't played an evil party for long, so I haven't tried it in the Order of the Radiant Heart yet...