The senator everyone called Draco ("the Dragon") was a bitter, withered specimen of humanity when the Bargain was made. He earned his nickname at the height of his power, in the years before Macer was Imperator, fighting as a general in the Legions, against the Alemanni tribes to the north. The natives were so impressed with his brutal tactics and vicious death-dealing that they called him "der Drachen," after the largest and most powerful beast in their lands. He liked the appellation and carried it home with him.
His words, in the days before the Bargain, led the other senators to suspect that he would be asking for the return of his youth and physical prowess. The sorcerous gift he actually requested stunned them all with its audacity - the power to kill with a touch. The room erupted in protest, but the dark powers they'd summoned ignored it and gave Draco what he wanted.
Montanus couldn't fathom it. Draco couldn't expect to live, considering the threat he posed. Then again - Draco didn't expect to live, period. He was old. And he wanted to inflict maximum damage on his enemies before he went - or after he was gone.
Draco carved a series of ornaments out of a drachen bone he'd taken as a trophy, years ago. There was a small model drachen, a hairpin covered with carved scales, a die with fangs threatening to bite down on each side, and other such fripperies. He imbued each with sorcery and hatred. They were Zerstorung bombs, designed to go off (using a variant of Indirect Touch) when the person they were created for came within five feet of them. Each inflicts 5 Dramatic Wounds of Zerstorung damage.
Whether or not these still pose a threat depends on exactly how Draco keyed them to his enemies. If he used a proper name, unless some very unlucky person with a Numan-sounding name encounters them, they are essentially useless. If he used some physical artifact to forge a link - a strand of hair or a fingernail paring - that artifact has surely decayed. The "pin" is gone and the Zerstorung bomb will affect the first person to come within five feet of it.
If he used a geas-like formulation - "Kill the wanton witch who walks the halls of power" - someone could put these deadly items to use. It would take an Occult check at TN 40 to recognize one of Draco's Gifts, and that should be allowed only if the character is aware of Zerstorung. Sorte, Scrying, or even Druidism might be able to puzzle out some or all of the triggering conditions. It might even take all three working together, at the GM's option - certainly these were never meant to be deciphered.
Montanus was able to use Draco's attack on Potestas as evidence that the senior statesman could not be trusted to maintain the "fellowship" of the Bargain. He and his followers were driven from Numa, retreating to south Eisen. Draco represented himself to the Alemanni as an incarnation of a drachen god and (after withering a few disbelievers) was largely accepted as such. The Numans with him were "of the Drachen" or "von Drachen." They continued a rule of terror in south Eisen until the first Baron Sieger eradicated the family in 981.
Note: Again on the forums, Keta Wahrheit had some good suggestions about this one, since he had long campaign experience with Zerstorung. His thoughts were that smaller "poison pills" that slowly killed from the inside out would be more in keeping with Draco's nature. In either case, since the sorcery's Knacks are focused on applying abilities under different physical conditions, the magical items should be an attempt to apply them through time. Basic Zerstorung doesn't have delayed effects.