The last laugh

When under the rain, 
They have nowhere to go; 
When their sluggish legs go 
Nothing but slow, 
I will have the last laugh I know. 

They think they have the arrows and bow, 
But under extremes and passing through low, 
Creating an arsenal for wars I foresaw, 
I'll have the last laugh I know. 

And finally when it's clear as snow, 
That what they thought was sand does actually glow,
And what you reap is exactly what you sow, 
I will have the last laugh, I know.