The Perfect Weapon

You will do just fine.
Everything about you is precise,
Calculated, and cunning.
My perfect weapon,
What have you ever meant to me?
Who were you supposed to be?
You destroy the enemy,
Blast them clear out of the sand.
Where, then, do I stand?
This debt I must pay,
How can I wave it away?
Perhaps we are even,
For you owe me, too.
You were mistaken to believe
You were helping me through.
In the end all you managed to do
Was annihilate all life in front of you.