Paladin acf?

[Lukalaly]

I saw online that there was an alternate class feature for paladin that replaces divine grace's save boost to an ac boost, allowing you to get sick AC boosts. However, I can't find the actual acf. Could someone tell me?

[ExLibrisMortis]

Champions of Valor, the Red Falcon substitution levels. It's a pretty terrible ACF. Take Ascetic Mage and a level in Argent Fist, instead.