For 5e Game Masters running high-level campaigns (levels 11–20) who are tired of watching their villains die in round two
A free, ready-to-run, three-phase final boss built to survive a tier 3 party for 8–10 rounds without blanket immunities or fudged dice. Download it, run it this week, and give your campaign the finale it's earned.

The Bellwright Sovereign · 17 pages · ready to run
You spent months building toward the villain. Then the wizard cast Banishment on turn one. Or the paladin crit-smited it into dust after Hold Monster. The table cheered, and you quietly flipped to your notes. High-level characters are built to delete single monsters — and most official bosses weren't built to survive them.
What you get
Separate HP pools for each phase mean one massive nova can't skip the fight. Banishment, Hold Monster crits, Forcecage, Polymorph and summon swarms each meet a specific, fair counter.
Your players' combos still work and still feel clever. They just don't end the fight alone. Crits land in full in the final phase, and built-in DM fairness rules keep it honest.
A ticking countdown and a non-combat objective give every character something heroic to do besides deal damage.
Use her as your villain's final form, the power behind the throne, or a standalone climax. Reskin her as a lich, dragon or fey queen, and the mechanics still work.
17 pages: three stat blocks, lair actions, arena map, read-aloud text, scaling for levels 11–20 and 3–6 players, two magic items, and a printable DM cheat sheet.



"Every classic boss-killer still does something. It just doesn't end the fight on its own."
Free PDF. No catch. Run it this week and watch your table finally sweat.
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