Sci Fi Saturday: Panspermihahaha

To seed a world with life is no small thing,
And rarely was it done with true intent.
This time, though, that strange faction, the Green Wing
Watched eagerly from far off as they sent
Those precious cells away to colonize
A planet of their choosing. How the wait
Did torture them! The generation's eyes
Who would behold their fruit would have a great
Responsibility, millennia
From then. But when the time came for to see
What had evolved, nought but hysteria
Resounded through the spheres, a vast "tee-hee!"
There's xenogenesis, when children's paths
Diverge from parents... But these just brought laughs!