Lich DustLevel 15

This white powder looks to be the residue of ground-up bones.

Consumable: Assassin poison        0 gp

Power (Poison) Consumable (Minor Action)

You apply the poison to your melee weapon or one piece of your ammunition. During this encounter, the next creature you hit with a weapon attack using the poisoned item takes 10 extra poison damage, and it is weakened (save ends).

Power (Poison) Consumable (Minor Action)

You pour the poison into a drink or onto a plate of food. Within the next hour, the first creature to consume the food or drink is weakened until the end of its next extended rest.

Published in Heroes of Shadow, page(s) 29.