Regarding any content related to the Dungeons & Dragons product:

The following items are designated Product Identity , as defined in Section 1(e) of the Open Game License Version 1.0a, and are subject to the conditions set forth in Section 7 of the OGL, and are not Open Content:

The World of Weirth Games name and logo, the names, descriptions, histories, and likenesses of all named characters, organizations, places, and events, all artwork, trade dress, and graphic design elements unique to the World of Weirth Setting created by Stephen Smith.

OPEN GAME LICENSE Version 1.0a
The following text is the property of Wizards of the
Coast, Inc. and is Copyright 2000 Wizards of the
Coast, Inc (“Wizards”). All Rights Reserved.
1. Definitions: (a)”Contributors” means the
copyright and/or trademark owners who have
contributed Open Game Content; (b)”Derivative
Material” means copyrighted material including
derivative works and translations (including into
other computer languages), potation, modification,
correction, addition, extension, upgrade,
improvement, compilation, abridgment or other
form in which an existing work may be recast,
transformed or adapted; (c) “Distribute” means to
reproduce, license, rent, lease, sell, broadcast,
publicly display, transmit or otherwise distribute;
(d)”Open Game Content” means the game mechanic
and includes the methods, procedures, processes
and routines to the extent such content does not
embody the Product Identity and is an enhancement
over the prior art and any additional content clearly
identified as Open Game Content by the Contributor,
and means any work covered by this License,
including translations and derivative works under
copyright law, but specifically excludes Product
Identity. (e) “Product Identity” means product and
product line names, logos and identifying marks
including trade dress; artifacts; creatures characters;
stories, storylines, plots, thematic elements, dialogue,
incidents, language, artwork, symbols, designs,
depictions, likenesses, formats, poses, concepts,
themes and graphic, photographic and other visual
or audio representations; names and descriptions of
characters, spells, enchantments, personalities,
teams, personas, likenesses and special abilities;
places, locations, environments, creatures,
equipment, magical or supernatural abilities or
effects, logos, symbols, or graphic designs; and any
other trademark or registered trademark clearly
identified as Product identity by the owner of the
Product Identity, and which specifically excludes the
Open Game Content; (f) “Trademark” means the
logos, names, mark, sign, motto, designs that are
used by a Contributor to identify itself or its
products or the associated products contributed to
the Open Game License by the Contributor (g) “Use”,
“Used” or “Using” means to use, Distribute, copy, edit,
format, modify, translate and otherwise create
Derivative Material of Open Game Content. (h) “You”
or “Your” means the licensee in terms of this
agreement.
2. The License: This License applies to any Open
Game Content that contains a notice indicating that
the Open Game Content may only be Used under and
in terms of this License. You must affix such a notice
to any Open Game Content that you Use. No terms
may be added to or subtracted from this License
except as described by the License itself. No other
terms or conditions may be applied to any Open
Game Content distributed using this License.
3.Offer and Acceptance: By Using the Open Game
Content You indicate Your acceptance of the terms of
this License.
4. Grant and Consideration: In consideration for
agreeing to use this License, the Contributors grant
You a perpetual, worldwide, royalty-free, nonexclusive license with the exact terms of this License
to Use, the Open Game Content.
5.Representation of Authority to Contribute: If You
are contributing original material as Open Game
Content, You represent that Your Contributions are
Your original creation and/or You have sufficient
rights to grant the rights conveyed by this License.
6.Notice of License Copyright: You must update the
COPYRIGHT NOTICE portion of this License to
include the exact text of the COPYRIGHT NOTICE of
any Open Game Content You are copying, modifying
or distributing, and You must add the title, the
copyright date, and the copyright holder’s name to
the COPYRIGHT NOTICE of any original Open Game
Content you Distribute.
7. Use of Product Identity: You agree not to Use any
Product Identity, including as an indication as to
compatibility, except as expressly licensed in
another, independent Agreement with the owner of
each element of that Product Identity. You agree not
to indicate compatibility or co-adaptability with any
Trademark or Registered Trademark in conjunction
with a work containing Open Game Content except
as expressly licensed in another, independent
Agreement with the owner of such Trademark or
Registered Trademark. The use of any Product
Identity in Open Game Content does not constitute a
challenge to the ownership of that Product Identity.
The owner of any Product Identity used in Open
Game Content shall retain all rights, title and interest
in and to that Product Identity.
8. Identification: If you distribute Open Game
Content You must clearly indicate which portions of
the work that you are distributing are Open Game
Content.
9. Updating the License: Wizards or its designated
Agents may publish updated versions of this License.
You may use any authorized version of this License
to copy, modify and distribute any Open Game
Content originally distributed under any version of
this License.
10. Copy of this License: You MUST include a copy of
this License with every copy of the Open Game
Content You Distribute.
11. Use of Contributor Credits: You may not market
or advertise the Open Game Content using the name
of any Contributor unless You have written
permission from the Contributor to do so.
12. Inability to Comply: If it is impossible for You to
comply with any of the terms of this License with
respect to some or all of the Open Game Content due
to statute, judicial order, or governmental regulation
then You may not Use any Open Game Material so
affected.
13. Termination: This License will terminate
automatically if You fail to comply with all terms
herein and fail to cure such breach within 30 days of
becoming aware of the breach. All sublicenses shall
survive the termination of this License.
14. Reformation: If any provision of this License is
held to be unenforceable, such provision shall be
reformed only to the extent necessary to make it
enforceable.
15. COPYRIGHT NOTICE
Open Game License v 1.0a Copyright 2000, Wizards
of the Coast, LLC.
System Reference Document 5.1 Copyright 2016,
Wizards of the Coast, Inc.; Authors Mike Mearls,
Jeremy Crawford, Chris Perkins, Rodney Thompson,
Peter Lee, James Wyatt, Robert J. Schwalb, Bruce R.
Cordell, Chris Sims, and Steve Townshend, based on
original material by E. Gary Gygax and Dave Arneson.
END OF LICENSE

Regarding any content related to the Low Fantasy Gaming product: