Mashup of Blight and Wall of Earth.

OK, this isn't exactly what would normally be printed, but where else could the mashup go? I didn't really like "at end of turn", but decided if it couldn't attack once, there was no reason for the more complicated "when becomes tapped" instead of just "defender".

Is there any way of making it so you don't have to remember this dies if your opponent can tap it, without changing it to "when this attacks"? Or is that ok?