Lyric discussion by SilvaraDragon 

Cover art for Wishmaster lyrics by Nightwish

A lot of this song is references to the Dragonlance novels.

Master! Apprentice!

Could easily refer to Dalamar and Raistlyn, who are also mentioned later in the song.

"I'll be with you soon, my Shalafi"

Okay, there's no way you can have read the books and NOT know what that means. 'Shalafi' is Silnaesti elven for master/teacher, basically the same thing as 'sensei.' It's what Dalamar calls Raistlyn.

Silvara Starbreeze

Silvara the silver dragon and Alhanna Starbreeze.... sound familiar to anyone?

Sla-Mori the one known only by Him To august realms, the sorcery within If you hear the call of arcane lore, your world shall rest on Earth no more

The Sla-Mori, the 'secret way.' The companions used a Sla-Mori in the Chronicals. Presumably there are more than one in the world.

A maiden elf calling with her cunning song "Meet me at the Inn of last home" Heartborne will find the way

The Inn of the Last Home is in Solace, where the Companions met and drank.

(Noooo.... I haven't read those books WAY too many times...)