If آپ could get Severus anything for his birthday what would get him?

Anti venom remover.

Honey-Badger anti-venom. xD SO HE CAN LIVE. I'd use the timeturner to go back in time when he was alive, give the anti-venom to him....aaaand...PROBLEM SOLVED. :3
Although, in my dreams, he never died. <3

Shampoo lol - (only from his book تفصیل - in the films he's a beaut)

A chance to make things right with Lily, because he deserves forgiveness at least.

well i would get him a huge collection of potion books:):):):)

i dunno maby another Calderon *shrug*

A grindylow in a jar of formaldehyde.

a bring-someone-dear-to-you-back-to-life potion (for Lily Evens of course)and a bring-yourself-back-to-life potion! :D

Butterbeer and a hug.