While this guide doesn't prescribe a specific pantheon, the multirealms is vast and every deity that has ever been worshipped - whether in legend, myth, or tale - exists somewhere within it. When a cleric calls upon divine power, they're channeling the will of something greater.
Your world can draw from any source of divine inspiration. Ancient mythologies, forgotten gods from obscure traditions, or deities from other game worlds you've enjoyed - they're all fair game. If a player wants their cleric to serve Thor, a invented harvest goddess, or even a deity from another game system they love, the answer can be "yes."
What does their deity value? Honor, knowledge, nature, trickery, death, life? How does worship manifest? Daily prayers, acts of service, spreading the faith? What would displease their god? Breaking oaths, destroying nature, showing mercy to enemies? What boons or trials might their deity send? Divine visions, tests of faith, miraculous interventions?
The beauty of keeping deities open is that your table becomes a melting pot of divine concepts. One cleric might serve a stern god of justice while another follows a mischievous trickster. Let your players bring their favorite divine concepts to life, and weave those threads into your world's fabric.
Remember: Gods are powerful, mysterious, and rarely straightforward. Even good-aligned deities might ask difficult things of their followers. The divine operates on scales mortals struggle to comprehend.