[Varyon]

Sounds like something that was made up by the author of the Pyramid article, but I don't have Psionic Powers to check and see if you may have just overlooked something.

I will note that canonically basing an effect (such as damage) on a different attribute seems to use the same pricing as basing a success roll on a different attribute, and the "Skills for Everyone" guidelines from Powers suggests allowing any attribute roll to be replaced by a skill roll; combining these factors may well be the justification for basing damage off skill.