Dragon Suppression Spirit Iron is not particularly precious; the price of a piece is only two million Dao Crystals.
But this was only the price from the past!
A hundred thousand years ago, the sole mining vein in Eastern Heaven Immortal World capable of producing Dragon Suppression Spirit Iron was destroyed, since then, Dragon Suppression Treasures have almost disappeared from Eastern Heaven.
Occasionally, a piece or two of Dragon Suppression Treasures or Spirit Iron are brought into Eastern Heaven by cultivators from the other Three Heavens.
Speaking of which, Ning Fan's Taigong Fishing Rod's Dragon Suppression power is not enough to instantaneously kill an Enlightenment realm, nor even to instantaneously kill a Fate Immortal.
Though it cannot instantly kill, it can greatly restrain Dragon Clan Cultivators.
