Brad himself responded to these questions.
1. The spell is a drop from a monster.
2. The regeant can be bought from a vendor.
No locations were given, the necro has to be in your group for the spell
to work, and the player's corpse closest to the necro is summoned.
>
> From: James Schuldes <jgs@...>
>
> There is a Summon Corpse spell. Your corpse can be pulled from anywhere in
> the current zone to the feet of the caster (necro I believe.) Also rumored
> to require a reagent (black enameled coffin???) not yet located on mobs or
> vendors.
>
> Any info?
>
> Sylly
>
> p.s. saw a post and person asked what mob in Paw dropped this spell. Not
> sure if he meant spell or the reagent.
>
> > Please send submissions for the eqbards newsletter to lol@... with the subject submissions.
>