Spawn image of Gunther Arcanus after quest 411 is completed

Script to run after completing quest 411 The Prodigal Lich Returns. C++ code by @kldxzzhc2
Modification: Added actual NPC text from http://www.wowwiki.com/Gunther_Arcanus .
OK, I will try my best to create such lines in MySQL, but I would love to look at some examples. If you have got any links or pointers for me, that would be great. The only existing text for Gunther Arcanus (NPC ID 1497) already in creature_text is the text used in quest 409 "Proving Allegiance". I'm not even sure if the spawned ghost image of Gunther Arcanus has the same ID.