[Help] How to setup a "spell_area"

Okay, I’m trying to make a quick fix for two quests…

When you complete Demonic Crystal Prisons some sort of script/event/something is supposed to happen so Spirit of Ar’tor is summoned/becomes visible/something so you can accept Lohn’goron, Bow of the Torn-heart to start the next quest chain.

I’m trying to do a quick and dirty fix so this will sorta work.

I’m wanting to have Spirit of Ar’tor creature spawned already but invisible to players UNTIL they complete the Demonic Crystal Prisons quest, at which point he becomes visible so you can start his quest chain.

I know some quests in Icecrown (Like Get the Key) are like this, and I think it had to do with setting something up in “spell_area” tables.

Is there a way I can do something like that for this?

Nope, spell_area are only on wotlk and cata quests, they must use a diferent way.