Just to reiterate, is there any human exploit potential? Because when you play a permanent, there is a certain order of the slots that your cards are played in, so you could do this to, say, always have a protected sundial (since Seism likes to torch non-upped dials, for instance). You could also put down the protect on a dial in the early game instead of throwing it away when you get a bad draw. Anyway, the first thing to establish is if this only works for the AI or if it also works for us lowly humans...
