Join the new world

Since the day this invaders of another world came
We have been fighting an ever losing war.
I think I'm the last of us.
The gods know that very well could be.
Now my, and our, only hope remains
In the sphere in my hands.
It came from their world.
That's why the fear it so much?
But I'm not going to surrender here and now.
I still can fight.
I don't know what it does.
I don't know what it means.
But I must keep it.
Since they fear it so much.
The fear makes them fail.
Where they could crush me.
Now they fall to my feet.
At last, a ray of hope.
In this already broken world.