Serc
Ben Adaephon Delat: 'There’s one spell, that bursts the victim from the inside out. Has to do with pressure, with violently altering it, even taking it away entirely. Or, as this looks like, increasing it outside the body a hundredfold. This man was killed by implosive pressure, as if he’d been hit by a mage using High Serc.’(MoI, UK Trade, p.726)
"I know this dragon," Icarium said again. "Sorrit. Its aspect was Serc. The warren of the sky." (BH UKTpb. p.134)