Huh, amazed this doesn't exist. Given Stealer of Secrets 2U 2/2 straight-up draw, this must be costed about right. Maybe it doesn't even need to be uncommon, though my first thoguht was "is it too strong".
I like it. This could probably sneak to Common when it really wanted to, though the textbox has so many words I think it will usually be more efficient at Uncommon. Also consider 1U 2/1 with "When ~ deals combat damage to a player, Scry 2."
In the abstract, each part of this is at least as much red as it is blue, right? An aggressive body with a damage ability?
Academy Raider says that this is blue, because red doesn't get to have as nice things.
And Sigiled Skink would also like to play with Tommy's point.
This is Blue Loot not Red Loot (aka Rummage). They made this confusing by originally printing Faithless Looting in Red and then deciding to back off and only give Red rummaging.
I think "when this deals damage to an opponent" is a bit more red (and maybe black?) than anything else, but every colour (even white) gets a bit of "when this deals combat damage to an opponent, do on-colour thing".