Fun fact, you can actually have up to 4 copies (3 Saul/Paul + 1 Paul) of Paul in T1 between your deck and reserve because Saul/Paul has errata that basically turns Saul's SA into an identifier, thus leaving him without an ability.
Saul/Paul (As Saul) (Apostles) - Special Ability: None. Identifier: Enters play as Saul. If Saul is converted, he becomes Paul.
Is that a Errata or Play As? In the REG a play as doesn't mean anything while Erratas are important.
From ORCID Errata section:
Special Ability - None (As Paul - Protect Paul from poison abilities. Enhancements used by Paul cannot be negated). Identifier - If Saul is converted to a Hero, he becomes Paul instead. (As Paul - No identifiers on card.) Reference - Acts 7:58 (As Paul - Acts 20:7)