Existe alguma regra para um clérigo mudar sua fé?

Manual do Jogador II (3.5) / Conversão Divina / p193

Esta é uma barra lateral na parte inferior da página referenciada, que faz parte de uma seção sobre regras para reciclagem. Se você não tem o livro, aqui está a citação direta:

DIVINE CONVERSION

As noted in the Player’s Handbook, a cleric who grossly violates the code of conduct imposed by his deity loses all spells and class features and cannot attain any more levels as a cleric of that deity. All these penalties remain in effect until he atones. But what if he doesn’t want to atone? What if a cleric of Hextor finds new meaning and purpose in serving Heironeous after a dramatic conversion experience? Such a character need not become a multiclass ex-cleric of Hextor/cleric of Heironeous. Instead, Heironeous can simply reinstate the character’s cleric powers once he has proven his loyalty, talent, and ability.

A cleric who changes his patron deity must complete a quest to prove his devotion to his new patron. The nature of the quest depends on the deity, and it always clearly reflects the deity’s alignment as well as his or her goals and beliefs. To start the process, the cleric must voluntarily accept a geas/quest spell cast by a higher-level cleric of his new deity. During the quest, the cleric has no access to spells or cleric class features—except his weapon and armor proficiencies, which he does not forfeit.

Upon completing the quest, the cleric receives the benefit of an atonement spell from a cleric of the new deity. The character then becomes a cleric of the new deity and is inducted into the clergy during an appropriate ceremony of the DM’s choosing. After selecting two of the new deity’s domains in lieu of his old ones, the character has all the powers and abilities of his previous cleric level, plus the granted powers of his new domains.

This method is the only one by which a cleric can change his deity. The retraining rules can’t be used to accomplish this task—it is simply too substantial a change in the character’s identity (not to mention his source of power) to chalk up to a bit of practice in his off hours.

Esta resposta reflete essencialmente a decisão já encontrada no Cenário de Campanha dos Reinos Esquecidos, mas pode ser útil saber que ela também está localizada em um livro de regras independente de configuração, para o caso de existir algum defensor por aí.

Não existe tal regra nos suplementos independentes de cenário que eu conheço.

Mas os suplementos específicos da configuração são outra história.

Configuração da Campanha Forgotten Realms, p233 ou algo assim:

Changing Deities

It is possible for a cleric, druid, paladin, or spellcasting ranger (or any other divine spellcaster) to abandon his chosen deity and take up the faith of another deity. In doing so, the divine spellcaster loses all class features of the abandoned deity. To progress as a divine spellcaster of another faith, the character must go on a quest for his new church (often the recovery of a lost item of some importance to the deity), then receive an atonement spell from a representative of his new faith. Once these two conditions are met,the character becomes a divine spellcaster of the new deity, and if a cleric,he chooses two domains from the new deity's repertoire. The character then resumes the class features lost from leaving the old faith(so long as they are still applicable — turning or rebuking undead ability might change, for instance)

Apesar de não estarem redigidas idealmente, essas regras implementam uma ideia simples: a mesma magia expiação faz o trabalho.

Existe outra maneira que não é mencionada em nenhuma das outras postagens. Uma nova divindade poderia literalmente assumir o papel de patrono do clérigo, especialmente se não for um grande salto nos portfólios. Há um exemplo disso é o livro de fontes Exemplares do Mal (Calais Archwinter).