As the all powerful Archaic Bard Zan is, he creates spells form now and then,if not magic items, or trying to conquer the universe. So he made this spell to allow him to take over and draw power from Gods.

You go to a physical embodiment of any god and cast this spell when within range, the god is then permanently trapped in the cell of at least 15 ft by 15 ft. When in the same dimension as the god you have trapped you are constantly gaining these sets of effects:

• Regain 20d20 Hit points a turn
• Resistance to all forms of damage
• The ability to never permanently die.

The more gods you gain the more powerful you become, as you reach around 90-99% of all gods trapped you gain these effects as well:

• Immunity to all damage
• advantage on all saving throws

If you capture every single god you also gain 1 more ability:

the ability to use the wish spell as a cantrip, without the fear of never using it ever again.