Binding Mastery is a ritual feat available to adventurers with the Ritual Caster feat, and who mastered Magic Circle and one other . The feat was introduced in the article Heroic Tier Rituals.[Dr405] The feat allows using Arcana or Religion in place of Diplomacy and Intimidate when interacting with creatures with a non-natural origin, and gives a +2 to checks made for this purpose. Once per day, the ritual caster may ignore the component cost of a mastered binding ritual of their level or lower.