Avatar of Divinity

Divine Avatar is an ability granted to high level clerics and paladins who have become suffused with their deities powers, becoming the avatars of these deities.
This transformation lasts for a limited time, determined by proficiency bonus (e.g., 1 minute per proficiency bonus).
Activation Requirement: Channeling the power of a deity into your mortal body is unstable at best. If the cleric or paladin is not using their powers within their teachings, or if they become extremely vulnerable, such as physically being near death or mentally by watching a close friend die, they could unwillingly enter their avatar form. If this happens then they could become trapped in this form forever, or until they perish. The only documented times of this happening do not tell of how to stop someone who has lost themselves to the divine powers.
Physical Transformation: When the transformation occurs, the avatar's appearance changes to reflect the divine aspects of their deity. They gain a radiant aura and features reminiscent of their god.
For example:
*War Domain: Enhanced combat abilities, bonus to attack rolls, and temporary hit points.
*Life Domain: Healing abilities, increased effectiveness of healing spells, and temporary resurrection ability.
*Nature Domain: Control over elements, summoning of beasts, and enhanced druidic abilities.
Consequences: If the cleric is not powerful enough (e.g., fails a saving throw against a DC determined by the DM) or if they use the power for chaotic reasons (e.g., attacking innocent beings), they risk losing control of their mind. This could result in temporary madness, alignment shifts, or even loss of control over the character until they atone for their actions.