Draiss described the spell as he deciphered it, adding extra bits, like probably cost of such a rune, clearly an epic spell and likely enough to bankrupt any dozen dragons they could name that weren't divine, though he did admit confusion as to how the caster would have known just how long to set the duration. He paused, and then added that it might have been done if they had used a telepathic or empathic spell trigger, with a certain 'weight' to the trigger before it activated, figuring that many dominant personalities together would create serious enough friction. He hummed to himself, before revising the cost further up, enough to bankrupt several very powerful dragons he could name, known through the planes, and that was just designing the spell. Actually casting it as many times as he suspected, which would have had to practically blanket the island to ensure something went off eventually, would have been a long and tedious job for him, just boring enough to get sloppy, and just dangerous enough to get one killed if they set one of the runes wrong and it blew up in their face. He then used the remains of the spell in front of him to try and see how many more of the spell there were and their locations, if there were any.