.. is it possible? Looking at the Guardian Circle spell, I know it's possible to continually apply effects to any actor within the hazard area. The only problem is that the effects last for however long their duration is and are then reapplied (visual effects and all). Is it possible to just have the effects last until the hazard expires or actor leaves it?

In case you're wondering, I'm trying to make a rune that applies invisibility to any actor standing on top of it (using a hazard to apply the effect).