Divine Knaves: Spitball

I've been thinking about how I would handle clerics in Knave. I've decided that a knave could turn undead if they present a holy symbol (in both hands?) and roll Charisma. It could either be a Charisma Save or it could be an opposed roll against the Undead's Charisma/HD DC. To flavor cleric spells, the spell-objects could be religious relics that perform certain miracles, like the femur of a saint which purifies water, or the bile of an anti-saint which animates the dead upon which it's poured.