Sapphire

They came to us in holy robes Sapphire as the sky They told us that their gods would keep us safe Don't question the means The price will be paid by enemies We struck a deal, they bared a knife An altar made of stone What cost a little blood for peace of mind? The lives of our enemies Were an offering to appease the gods The outsiders bled, our walls were strong But then they turned their eye Started finding enemies within Insatiable were the gods But we willfully let them through the gate Sapphire robes won't hide the stains But that was never their intent