In Hades, there is an item called Pom of Power. On this page you will find basic information about it, you will find out what it is for and how to use it.
A pom of power is an artifact increasing the level of one of your boons. You can get it as a room reward or buy it from Charon for 100 Obols.
Increasing the force of the pom of power
If you acquire a pom of power from the Chaos Gate, Temple of Styx, or purchase it, 300 Obols will increase the level of the boon by two levels.
Remember, that using a lot of poms for the same boon will be less effective each time.