I'd like to publish an OGL adventure for 5e. In order to keep its size small, I'd like to avoid having to repeat stat blocks for simple creatures like the skeleton, the zombie, etc. And because not every creature is in the SRD5 (like the flameskull), I can't include their stat blocks.
In an ideal world, I would simply write something like this:
Two skeletons (Monster Manual pg. 272) and a flameskull (Monster Manual pg. 134) guard the door...
Would this be a breach of section 7 of the OGL 1.0a, of any other part of the OGL 1.0a, or of U.S. trademark, copyright, or other IP law?
Could I instead legally write the following?
Two skeletons (MM pg. 272) and a flameskull (MM pg. 134) guard the door...
If not, how can I legally reference a specific page of the Monster Manual? Would I have to resort to something like this -- and would it even be allowed?
Two skeletons (official bestiary pg. 272) and a flameskull (official bestiary pg. 134) guard the door...
In SRD5, it states that "Monster Manual" is part of the SRD5's Product Identity:
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: Dungeons & Dragons, D&D, Player’s Handbook, Dungeon Master, Monster Manual, d20 System, Wizards of the Coast, d20 (when used as a trademark), Forgotten Realms, Faerûn, proper names (including those used in the names of spells or items), places, Underdark, Red Wizard of Thay, the City of Union, Heroic Domains of Ysgard, Ever-‐‑ Changing Chaos of Limbo, Windswept Depths of Pandemonium, Infinite Layers of the Abyss, Tarterian Depths of Carceri, Gray Waste of Hades, Bleak Eternity of Gehenna, Nine Hells of Baator, Infernal Battlefield of Acheron, Clockwork Nirvana of Mechanus, Peaceable Kingdoms of Arcadia, Seven Mounting Heavens of Celestia, Twin Paradises of Bytopia, Blessed Fields of Elysium, Wilderness of the Beastlands, Olympian Glades of Arborea, Concordant Domain of the Outlands, Sigil, Lady of Pain, Book of Exalted Deeds, Book of Vile Darkness, beholder, gauth, carrion crawler, tanar’ri, baatezu, displacer beast, githyanki, githzerai, mind flayer, illithid, umber hulk, yuan-‐‑ti.
In the OGL 1.0a, these restrictions on use of Product Identity exist:
- 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.