Drawn to sites which have been heavily touched by elven magic, patches of siren grass lure their victims with a sweet melody, only to trap them in their vines and drag them down under the earth.
Arcane Vestiges
Siren grass seeds, puckered grey beads that emit a soft hum, usually only grow into small clusters of harmless purple flowers. It is only in the presence of especially powerful fey that they fully flourish and produce actual siren grass. On the material plane, siren grass can often be an indicator of the presence of old elven ruins.
Encounters
Expedition 02 - The Wailing Cavern