Final curse of an ancient civilization

Summoning of the Great Scarlet Dragon

Light the sky with a crimson flash
Split the clouds like a bloody gash
Descend, O angel of the Red
I desire to see my enemies dead

Brandish claws the size of trees
O lord of dragons, hear my pleas
My power alone will not succeed
Your deathly fangs are what I need

Unleash lightning from your mouth
Kill all my foes from North to South
This is the curse I call upon
This is the ritual I have forgone

But I need power, I have no vice
Defeating my enemies shall suffice
Spare the women, spare the young
Stop destroying when our bell is rung

What we ask may sound cruel
But our foes made me a fool
Their dark betrayal will doom us all
So, O dragon, make them fall!