The ancient covenant

A treaty between alpha and omega beings
Summoning a darkened era upon Earth
Ancients receive immortality
The rest shall be servants of the gods
Slow-poisoning xenobiotic substances will enslave your sick
A pact of horrifying consequence
A new alteration
Humanoid mutation of alien seed
The agenda implemented through genetic infiltration
Sinister
Undignified
Promising unearthly intellect
Feeding on the selfishness of man
Forever
The ancient covenant is sealed with the blood of unsown (tainted) loins
Begin integration of the hybrid population
Ancients join the ranks of the gods
For their curses of destined generations