She had thought of the spurge only after hearing Adaira’s explanation of Aethyn’s side effects, how it had turned her cold, as though ice had gathered in her veins, weakening her heart. What better way to counter poison of ice, she had realized, than with poison of fire? She had also deduced, after not seeing the spurge in David’s herbarium, that it was an entirely eastern plant. It made sense now that the Breccans had failed to find an antidote to the poison that often plagued them.