Itola

Itola is a demon (or two demons, depending on one's perspective) who appears to mortals as two mortal twins, one male, one female, their appearance and clothing changing to match the culture and race of the mortal they appear to. Itola's true appearance is unknown.

Itola seems to not necessarily be interested in destruction and chaos, but rather, in making sure everyone they form a pact with remains interesting. In some ways, this can lead to a pact with Itola seeming to give much power for little or nothing in return.

In reality, however, Itola expects mortals they grant power to to be entertaining, and they can easily take back the power they give, sometimes even kill mortals who fail to do anything significant or retire after making a pact with them...