You have witnessed an act of one of the gods that tests your faith, or lack thereof.  

• Increase your Wisdom, Charisma or Intelligence score by 1, to a maximum of 20.
• You have advantage on positive social interactions with acolytes and followers of this god.  
• You learn one cantrip pertaining to this god's domain: i.e. if the god is Pelor, you may choose "Light" or if the god is Hermes, you may choose "Message."  Confer with your DM for what makes the most sense for your story.