Mantra Artwork
J. Culafiore (?) 1994
Black and white ink drawing of Mantra flying and casting a spell.
Mantra Artwork
Bob Petelca (?) 1994
Black and white ink drawing of Mantra with the Sword of Fangs.
Mantra Artwork
Chris Narrins (?) 1994
Black and white ink drawing of Mantra flying.
Mantra Nude
Greg La Rocque, November 1995
Pencil sketch of Mantra missing part of her armor, no doubt due to another
one of Boneyard's evil schemes. 
Mantra Artwork
Robb Phipps 1999
Pencil sketch of Mantra casting a spell.
Wizard Letter
Sgt. James Norris; Wizard #42 February 1995
Fan artwork on a letter sent in to Wizard magazine.
Wizard Fan Cover
Joey Guajardo; Wizard #35, July 1994
Fan-submitted artwork of a cover to Wizard magazine.
Mantra, NecroMantra and Lauren
Dave Roberts; November 1999
A custom piece done by Dave Roberts (who was the penciller in the later issues of the series). Here, we see NecroMantra attacking Lauren, with Eden coming to the rescue. (It's a shame we never got to see this scene in the comic.)
The first two images are scans taken from the earlier stages of the artwork design, which Dave was kind enough to send along. Personally, I think it's fascinating seeing this kind of stuff "in producution," so I thought I'd toss them in case others were curious.
Comics 2000 Advertisement
Dave Roberts; November 1999
Another custom piece by Dave Roberts, this artwork was a proposed image
advertising the Comics 2000 convention. Sadly, Mantra lost out to another
brunette super-heroine, Wonder Woman. (Whoever she is.) 
Proposed Mantra #23 Cover
Dave Roberts (penciller); Jim Amash (inker); 1995
Here we have the "lost cover" to Mantra #23. The last issue of the first series was #24, but the last two issues were apparently cleaning out material that was sitting around before Black September hit and Eden was given the boot. (For instance, I believe that #24 was originally slated to be a separate Mantra/Ultraforce one-shot.) However, if the series had continued, this would have been the cover for issue #23. I don't have any details on what the story was to have been, but thanks again to Dave Roberts for sharing this lost bit of Mantra history.