You can use an action to place this 1-inch metal cube on the ground and speak its command word. The cube rapidly grows into a fortress that remains until you use an action to speak the command word that dismisses it, which works only if the fortress is empty.
The fortress is a square tower, 20 feet on a side and 30 feet high, with arrow slits on all sides and a battlement atop it. Its interior is divided into two floors, with a ladder running along one wall to connect them. The ladder ends at a trapdoor leading to the roof. When activated, the tower has a small door on the side facing you. The door opens only at your command, which you can speak as a bonus action. It is immune to the knock spell and similar magic, such as that of a chime of opening.
Each creature in the area where the fortress appears must make a DC 15 Dexterity saving throw, taking 10d10 bludgeoning damage on a failed save, or half as much damage on a successful one. In either case, the creature is pushed to an unoccupied space outside but next to the fortress. Objects in the area that aren't being worn or carried take this damage and are pushed automatically.
The tower is made of adamantine, and its magic prevents it from being tipped over. The roof, the door, and the walls each have 100 hit points, immunity to damage from nonmagical weapons excluding siege weapons, and resistance to all other damage. Only a wish spell can repair the fortress (this use of the spell counts as replicating a spell of 8th level or lower). Each casting of wish causes the roof, the door, or one wall to regain 50 hit points.
Notes: Utility, Warding
How do you figure out its common word?
Do you make up a word?
It states that it is made of adamantine, so i believe it would have an ac of about 23.
Can this be dispelled? If an Anti Magic field is suddenly brought up in this thing's vicinity, does it stay a bunker, or revert to a cube?
It does not say that it is immune to being dispelled but it does specify it cannot return to its small size if it is not empty. So I would say if its empty, can be dispelled. If its not empty, can't be dispelled.
i don’t think it would increase the damage rather increase/decrease the radius at which creatures can take damage and i’m new so i don’t know about if that spell could even work on it i looked up the item because i saw it on a random item chart and said“ THAT SOUNDS AWESOME!!”
Say I were to inflate my tower inside dwarven build castle gate? The gate is busted right? Any damages to the tower?
Does the guy that summon it take damage as well?
Also, if there is anything inside of it, does it shrink, or get crushed and brake the fort?
You've probably found it by now but here
https://www.reddit.com/r/battlemaps/comments/fwtp4j/instant_fortress/
Could the trigger word be spoken by the Magic Mouth spell or something similar? My thought is this - if a party was being pursued through a narrow canyon (maybe 25 feet wide) could you set the cube in the middle of the canyon and cast Magic Mouth on a nearby rock to speak the trigger word when your pursuers get within range of the tower's expansion?
It's kind of weird that it only has two floors at a height of 30 ft.
As a DM, I would easily allow it to be three floors instead which still would easily allow the floors to have ~8 ft. of ceiling height, which is more than enough to comfortably fit medium sized creatures.
The party I DM for that found one figured out what it was in the manor owned by one of the characters... went straight through the roof (both the tower and the manor owner lol)
I beet a level 20 fighter as a leve 11 wizad with this
According to the Dungeon Master's Guide, adamantine has an AC of 23 and, since the fortress is made of adamantine, I'd give it 23 AC.
it regains hit points every time its summoned
No it does not
Starting a new campaign at level 6 and my DM gave me a nerfed version of this I'm still very excited about!
Question: So is the Fortess actually reusable? It doesn't say it has daily charges or cant be used again until next dawn ect like literally every other reusable item in the game. So can it actually be used more than once? or is the "dismissed" just a way to get rid of the tower after its be cast without having to beat it to a pulp.
RAW, it does not require charges or attunement. It is effectively a semi-permanent (destructible) magic item that can be deployed to fortress or stowed to portable cube as often as you wish with no limitation but speaking the command word and accounting permanently any damage it receives - unless you have access to the wish spell to repair it. The lack of attunement and activation via a command word does mean that, even if your GM would allow you to engage in the "throw it like a hand grenade and then activate it to damage everyone near where it lands" shenanigans as has been much discussed previously, you really probably shouldn't. Hand grenades are one-time use items, this is not; if you toss this across the battlefield then activate it, congratulations you just shouted the command word across the battlefield and then gave it to your enemies. If the expanding tower did not kill every enemy on the field, there is nothing to stop them from repeating the command word to stow it back to a cube and returning the favor. Alternatively, they might just run off with your extremely expensive rare magic item to sell it and retire. And thus was born the wealthy goblin kingdom of Nob the Nimble, who fled from his first and only encounter with adventurers, but managed to acquire a little souvenir on his way out.
Is it really dense before you say the word or does it create matter. If it's just super dense, you could never pick it up, but if u could, u could smack someone in the head with it and kill them