SKyrim kill Paarthurnax or not?

Question

The Blades want me to slay Paarthurnax

but he is a cool dragon and he helped me a lot

should i kill him or not?

Answer 1

If you do - the blades will talk to you - but the greybeards will not.

If you do not - the greybeards will talk to you - you will get a vid after main quest with him - the blades will not talk to you

Comments

talk to parthurax whatever then finish the main quest line, eg go to whiterun etc, then go to the blades when there is no more quests for the main storyline and if there is nothing the greybeards are needed for, then kill him and continue with the blades quests.