Owl - It is eyes just keep following you.
Dubious apostraphes aside, let us consider the virtues of Owl for a moment. First and foremost - It's thematically excellent! Owls are known for their silent flight, and this thing glided so silently under the radar that I even forgot what cycle it was in.
Now, on to practical stuff. Adding to the stack instead of trashing seems to be an increasingly useful effect. As well as getting around things like good old Trash'o'Cube and borking fat witchy stacks, the added click and credit(s) hassle is not to be underestimated. In edge cases, it can also throw a (mini, meccano-sized) wrench into decks that have a lot of shuffle effects. Can't go tutoring stuff quite so easily when you have something valuable on the top, huh? Not to mention it's also very useful when, ah...
Honestly, I just like owls. Never mind the mechanics. Owls are cool. Owls are good. Give one a home. Put an Owl in your deck today!
Definitely not an Owl ((@v@))