Heh. I like this kind of effect because it lets you tap opponents' stuff as a cost, which you very rarely get to do. It does confuse players due to priority order, but this is uncommon so that's fine.

LOL, yeah, I like it.

Although I wonder, is there a more straightforward way to achieve the same effect? Which is more important, the ability to tap the creature once whilst bouncing the aura, or the ability of the opponent to (occasionally) prevent the aura bouncing?

This also has a minor templating problem that if you keep "tap enchanted creature" as a cost, it doesn't require the creature to be untapped first, which is REALLY confusing. It would be plausible to add "tapping as a cost automatically requires an untapped creature" to the comprehensive rules, although wizards haven't. Else, you'd need a disclaimer like on these.

Jack's point jumped into my head too. I hate to mention this by way of suggestion, but you could put tapping the creature on the right hand side of the colon, thus removing some of the confusion. I get the feeling you don't want to do that, though.

oh, this is very nice