How can you have eradicated the serpent seed if you are not baptized in the Kingdom yet? Because when you have eradicated the serpent seed by repentance, you will enter into the Kingdom.
“Verily, verily, I say unto thee, Except a man be born of water and of the spirit, he cannot enter into the Kingdom of God.“John 3:5
“Not every one that say unto me, Lord, Lord, shall enter into the Kingdom of Heaven but he that doeth the will of my Father which is in Heaven.“Matthew 7:21
You cannot minus anything from the Will of the Father in entering into His Kingdom. Eradicating the serpent seed is entering into the Kingdom. You have to do all that He has commanded us to do.