Twelve

You've killed the wrong dragon and now need to return her remains to her homeland. It's a big job. They have a warm spot in their heart for you, Right after they cut out yours. Since a handful of people no longer seem adequate, how about a navy to get you there and an army to protect you when you arrive. So what is a few dragons between friends. Could it be they are raising a dragon army? Certainly not They are just evil dark elf priests. Right down your alley.