User blog comment:DaughterOfEvil/My Theories About The Chronicles/@comment-5759915-20130419103412

"A blade was wrongly dipped in the spring: the spring was the original form of Envy, and the blade mentioned could be the Venom Sword, thus creating my half-baked theory on why Kayo's Scissors and the Venom Sword will not awaken"

The blade were the scissors, in fact, Elluka dipped them in the spring to force Kayo to commit the sin of Envy