Very accurate depiction of how Jack's powers function, and he's no slouch in the combat department, either.

Can he damage lanterns?

Lanterns are not "characters" and his trait only damages "characters." Good thought though.

I asked the same question the moment I saw his dial. Shame it doesn't work that way.

Love this guy. But he needs some Super strength, he's been known to puch and kick off peoples' heads. A normal guy couldn't do that. But that was before the DC proper New52 mainstream comics so who knows now