RG Live WotLK 3.3.5a

NOW: When Blackblade of Shahram procs, it summons Shahram who will follow the player and autoattack for 60 seconds before despawning.

SHOULD: Shahram should use on the following 6 spells and despawn shortly after:

Flames of Shahram
Curse of Shahram
Will of Shahram
Blessing of Shahram
Might of Shahram
Fist of Shahram

Sources:
http://wowwiki.wikia.com/wiki/Blackblade_of_Shahram
https://www.wowhead.com/item=12592/blackblade-of-shahram
https://youtu.be/K66BN87sbW0?t=2m4s ---> Potato quality but you can see at 2m 4s that Shahram spawns, casts a Flamestrike and then disappears.