Upas tree

The upas tree is a tree with poisonous properties. Taurus the master thief once fashioned a rope made from the hair of dead women that he took from their tombs at midnight, and steeped in the "deadly wine" of the upas tree to give it strength.

Epemitreus the Sage used the poisonous juice of the upas tree as a weapon in his battles with Set, according to his poetic epigraph in chapter 4 of the Conan story "The Phoenix on the Sword".