خون سیاوشان

Etymology
equivalent to Neo-Persian + a by-form of, within the  mythicized as a character whose blood purified everyone, paralleled by the wide range of application of the red resin of the dragon tree.

The S͟ẖahnāma then preserves the idea in the recount that the legendary prince falls victim to and where his blood was spilled the dragon-tree grew, accompanied by  representing the crest on his helmet.

To this day the passion is reenacted in the course of the bloody, after a history of transformation in which Ḥusayn ibn ʿAlī took the place of the likewise violently killed Siiāuuaršan of the Avesta.

Noun

 * 1) dragon's blood