Ed, have you ever states how long the ritual took for the elves that created Evermeet?

I have carefully never stated how long the ritual took. ;}
I have said, once, how long a character recalled the casting of a complex mythal taking (a LONG time). The definition of rituals in that game edition was something far too long to be possible during, say, combat. ;}

— Ed Greenwood (@TheEdVerse) October 15, 2018