Forbiddance: A Guide to One of D&D’s Most Underrated Power Spells
Introduction
What’s up, everyone? Glad you’re here for our newest post! If you’ve ever gotten to level 11 and thought, “Seriously, what is Forbiddance, and why does it cost such a high-level spell slot?” then welcome to the club.
This spell usually just gathers dust in people’s spellbooks. But honestly, once you grasp what it does, it’s surprisingly effective. It’s got some real bite when it comes to keeping unwelcome guests out. This spell is a fantastic tool for area denial.
Today, we’re taking a closer look at this often-missed utility spell that can lock down entire dungeons, banish specific kinds of creatures, and essentially tell any demon to get lost. It’s much more useful than it appears at first glance.
So, let’s jump right into the magic and see how Forbiddance works its wonders, when to pull it out, how to break its hold, and some cool (and slightly evil) ways you can tweak it for your own game world. You might just find your new favorite spell!
Understanding Forbiddance: The Basics of this Powerful Spell
First off, let’s break down Forbiddance into the most basic version I can manage. You cast this spell over the course of an hour. You need a bunch of silver dust, some chalk or ink, and probably a cup of tea because it takes forever.
But once you’re done, the area a cube up to 40,000 square feet of space is sealed.
How sealed? Let me count the ways:
- Teleport and Planar Travel? Blocked.
- Undead, celestials, fiends, fey? You can ban up to five types.
- Anyone from those groups who tries to enter? They take 5d10 psychic damage. Daily.
- You can make it permanent with daily castings for 30 days.
This is less a “tactical nuke” spell and more like laying down magical razor wire around your fortress. Think of it as the high fantasy version of electrified fencing, motion sensors, and a sign that says “Beware of the Wizard.”
You can even customise the passcode, like magical two-factor authentication. Only people who say the right phrase or carry the right token can come in safely. Everyone else? Zzap.
Oh, and it alerts you mentally when someone breaks in. Basically, it’s every paranoid wizard’s dream come true. And yes, it works beautifully for paladins, clerics, and any Lawful Neutral abbot who doesn’t want anyone crashing his monastery sleepover.
Strategic Applications: When and How to Utilise the Forbiddance Effectively
So you’re thinking, “Cool, but when would I ever use this?” Let me paint you a picture.
You’re in a tower, deep in lich country. Your party’s sleeping. You know the local undead warlord has a fetish for teleporting into people’s bedrooms. Cue Forbiddance. No more midnight vampire jump-scares. Just silence, maybe a psychic scream at dawn if something dumb tried to enter.
Forbiddance is not a battlefield spell. It’s for places you control, defend, or return to. Think:
- Securing a magic lab
- Protecting a town hall from demon incursion
- Creating a trap-laden vault for your cursed treasure collection
- Building a holy sanctuary immune to interplanar pranks
One of my favourite uses? Make a friendly temple an interplanar refugee zone. Cast Forbiddance to block fiends and bar teleporting—now no devil can pop in and collect a debt. You’ve just created a story hook and a safe zone.
If you’re a DM, turn this into a quest: the local cleric needs help casting Forbiddance for 30 days straight to make it permanent, but cultists keep interrupting. Protect the rituals, and your players get lifetime access to a magically secure base.
Overcoming Forbiddance: Countering and Navigating Protected Areas
Now the flip side. You’re the player, not the caster. The BBG has warded their lair with Forbiddance, and now your plan to teleport in, grab the gem, and teleport out is toast. What now?
Well, good news: like most magic, Forbiddance isn’t unbreakable.
I once had a player, Marcus, who was sure his teleport-happy wizard could zip in and out of every dungeon with zero consequences. He’d show up, snag the loot, and bamf out like a magical raccoon. Cute the first time. Frustrating by the fifth.
I tricked the bad guy! I put a “no teleport” spell on his hideout. Marcus, the villain, confidently unrolled his teleportation scroll, grinned like he’d already won, and mumbled the magic words.
But instead of zapping away, there were just some sparks, a puff of smoke, and he just stood there, blinking in confusion like an owl.
“That’s weird,” he said.
I just smiled and described the runes glowing faintly on the cave floor. Now he had to walk. Through traps. And minions. And puzzles. Suddenly, the wizard was working with the party, not just fast-travelling past the plot. Game. Changed.
Countermeasures:
- Dispel Magic: Hard, since Forbiddance lasts forever if made permanent. But a DM might allow it on an area-by-area basis.
- Antimagic Field: Messy, but functional. A well-placed AMF bubble can suppress Forbiddance enough to let you sneak through.
- Physical infiltration: If teleporting is blocked, dig a tunnel. Fly in. Use wild shape. Go full Mission: Impossible with grappling hooks.
- Fake it: If the barrier uses a passcode or item, steal it. Or convince a clueless cultist to escort you inside.
The trick to beating Forbiddance is creativity. And patience. If your DM has made it airtight, they probably also left some other way in. Look for ritual circles, control runes, or a backup entry via the ethereal plane.
Or if you’re really bold, just walk in and tank the 5d10 psychic. Bring healing potions. Lots.
DM’s Toolkit: Incorporating Forbiddance for Narrative and Mechanical Depth
Forbiddance is a Swiss Army knife for DMs. It locks off areas, sets the tone, and explains why the big bad doesn’t just get assassinated by a teleporting rogue.
Want to build tension? Drop rumours that someone cracked a Forbiddance ward that stood for 50 years. Now something is loose.
Want to limit player travel without railroading? Drop hints that Forbiddance is active in key locations. They need a pass, an item, or a workaround. It adds puzzle-solving to exploration.
It also helps reinforce the world’s power balance. If every cathedral, wizard college, and castle has a Forbiddance zone, it tells the players, “This world takes threats seriously.”
I dig it for the bad guys too. Imagine a brainy baddie, a sorcerer type, throwing down a “No Entry” spell called “Forbiddance” all over his twisty fortress. Any regular folks who bust in get their brains scrambled a bit, and they can’t just poof away.
So, your crew has to crawl, charm, use tricky illusions, and just plain walk their way through. It makes for a super tense and exciting challenge, forcing them to think outside the box.
Beyond the Rules: Creative Interpretations and Homebrew Ideas
Here’s where things get spicy.
What if Forbiddance wasn’t just a static barrier? What if it was…
- Tied to seasons: only active during winter.
- Tied to a name: only blocks creatures that know the caster’s true name.
- Set to puzzle mode: the passphrase changes each day based on riddles left on nearby statues.
- Portable: cast it inside a bag of holding or a magical mobile home.
I once had a villain use Forbiddance in reverse: anyone not evil was burned on entry. A paladin nearly died just walking through the door. It led to some amazing conversations about moral alignment and identity.
Forbiddance is one of those spells that rewards DMs who want to tell deeper stories. Use it to separate zones of control, create mysteries, or make the players paranoid in a good way.
TL;DR Cheat Sheet
- Forbiddance creates a no-teleport zone and bans up to 5 creature types.
- Great for home bases, temples, and narrative dungeons.
- Blocks interplanar travel, deals 5d10 psychic daily to violators.
- Can be bypassed with passcodes, magic items, or creative infiltration.
- Makes an excellent narrative device for DMs.
Conclusion
That’s our deep dive on Forbiddance! Hopefully, now it’s not just a 6th-level spell you ignore until level 17.
Whether you’re a paranoid archmage or a sneaky thief trying to break in, Forbiddance is a great way to shape your world, defend your secrets, or start a dungeon crawl that doesn’t begin with teleport.
What’s your favourite way to use Forbiddance? Let me know in the comments below! And don’t forget to check out more blogs for more crunchy, weird, and fun D&D deep dives. Cheers!
FAQ
Q1: Can you cast Forbiddance in a demiplane?
Yes! It’s one of the best places to use it. Combine with Mordenkainen’s Magnificent Mansion for ultra-security.
Q2: Does Forbiddance block allies?
Only if they match a forbidden creature type or don’t know the passcode. You can include them as exceptions.
Q3: Can you teleport out of a Forbiddance area?
Nope. It blocks both entry and exit via teleport or planar travel.
Q4: How big can the area be?
Up to 40,000 square feet, shaped however you like as long as it’s one continuous space.
Q5: Can you stack multiple Forbiddances?
Technically, yes, in separate spaces. You can wall off an entire city block with effort and planning.
This post includes game mechanics reproduced under the Open Game License. All rights reserved to Wizards of the Coast.