TheyMightBePowers
The TheyMightBePowers are a form of elemental creative energy associated with the songs of They Might Be Giants. They give their wielders the power to create or channel phenomena associated with one or more of TMBG's songs. They are administered by a cosmic being known as Size-of-the-Entire-Universe Man.
Size-of-the-Entire-Universe Man bestowed the TheyMightBePowers on Particle Man by hitting him with a cosmically charged frying pan from space. This also gave the powers in a more limited form to a group of bullies who were attacking him, who became Pencil Rain.
Occultism Kid speculated the TheyMightBePowers were a form of "universal magic" inherent in the Looniverse itself. Like the Power Kirby, they may also be a manifestation of the Source Code channeled through particular artists.