Hee. Fun idea. Unfortunately has rules issues with the way the combat step is skipped if no attackers are declared, although it has slightly less such issues than most such cards (the creature will still come back, and be tapped, but if no other attackers are declared, the combat step will end immediately).

Of course, you could propose to amend that rule so that combat proceeds if there are any attacking creatures, which would be eminently sensible.

Oh yes, good point. I'd completely forgotten that wrinkle. Maybe there is a good reason Rocket-powered Turbo Slug was in an Un- set after all :)

Although, apparently the rules now say "The declare blockers and combat damage steps are skipped if no creatures are declared as attackers or put onto the battlefield attacking" so have they updated it? There are quite a lot of "onto the battlefield attacking" cards now, but none that don't rely on a creature already attacking.

Oh, do they? ...So they do: rule 508.6 has been updated since I last checked. That's very sensible. In which case, ignore my objection.

This is awesome. Can I use it in my set, http://multiverse.heroku.com/cardsets/92? It's a Doctor Who-themed set, so lots of time travel and exile mechanics.

dude: Yes, please do.