The Understudy

It has been watching your player. It has the voice, the walk, and the one thing they always say. It plays them better than they play themselves.

A free Creature Keeper for 5e (SRD 5.1): one original monster, fully statted, with the tables and the running notes that make it land at a real table. Not a stat block on a page. A monster you can run tonight.

Why it works at the table

• The horror is a performance review. It does not just look like the character, it does the bit the whole table has learned to expect from them, and does it better.
• It splits the party without a single spell. The moment two people disagree about who is real, you have the encounter.
• It is built for the reveal, with notes on how long to hold it and how to land it.

What you get

• The Creature Keeper (HTML), a self-contained page that opens in any browser and runs fully offline, forever. Stat block, tables and how-to-run notes, all rollable in place. No install, no account, no login, no internet.
• The full stat block, budget-checked so you can trust the fight before you run it.
• Running notes: how it opens, how it escalates, and what it does when the players get clever.
• 100% original. Nothing here is reprinted from anyone else's book.

It plugs into Gnasher's Grimoire

This Creature Keeper loads straight into Gnasher's Grimoire, the free offline DM app at longislanddungeonmaster.com/grimoire. Summon it over whatever adventure you are already running and roll it without leaving the page.

Free, and it stays free

A new free monster drops regularly. If the format earns a place in your prep, the paid one-shots and monster guides are on this same page in the same format.

From Long Island Dungeon Master, the Keeper line: game content that comes with its own table engine.