Scanning the island, he doesn't locate any more copies of the spell. He does, however, note the triggering conditions of the spells; apparently, he could only cast one a day, as the oldest was set to detonate in '27 days' while the last was set to trigger in '21 days', designed to go off as soon as someone approached close enough, once the timer had expired. Until then, they were very low-level, background magical radiance, blending in easily with the other magics the dragons would be using.<br/><br/>It seems that just the seven were planted, and all in the caves the chromatics would be using.