Quest from: Sir Ralvas;
Speak with Sir Ralvas and he'll tell you to go to the Chapel in Leyawiin to find the Mace of the Crusader. Inside you'll meet Carodus Oholin, who didn't succeed in retrieving the weapon. Go down to Chapel Undercroft and approach the marked shrine (Tomb of Saint Kaladas). Activate it and you'll be teleported to another plane. Just go forth and grab the mace. Yup, it's so simple - as long as you have Boots of the Crusader on you, hah.
Once you're back to the chapel, you'll see it's being attacked by Umaril's minions. Help the priests defend the place and then talk to Carodus again. Let him join the order.