At that time, the surface of Ashan was irrigated by Dragon Veins. Beasts that drank these untamed rivers of dragonblood crystals were permanently altered by their powerful magic.
The Manticore seems to mix features of various animals: lion, bat, scorpion. These beasts are notorious for their venomous stingers, whose poison corrodes the hardest materials like acid and cripples the muscles, inducing a progressive paralysis.
Scorpicores are Manticores that the Dark Elves have exposed to underground sources of dragonblood crystals attuned to the power of Darkness. This process makes the magical beasts stronger and more obedient.