# Daern's Instant Fortress > [!info] Item Details > | | | > |---|---| > | **Category** | Wondrous Items | > | **Rarity** | Rare | > | **Attunement** | No | > | **Source** | DMG p.160 | --- ## Description 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. The fortress must be placed on solid, flat ground. 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, any creature in the area where the fortress appears is pushed to an unoccupied space outside the fortress. Nothing can be inside the fortress when it is dismissed; if something is inside, the command word fails. The fortress has AC 20 and HP 500 and is immune to damage from nonmagical weapons excluding siege weapons. --- ## Properties - Action: place on flat ground and speak the command word to create a **20×20×30 ft stone tower**. - Tower has **AC 20** and **500 HP**; immune to nonmagical weapon damage (excluding siege weapons). - Includes arrow slits, two interior floors, ladder, trapdoor, and rooftop battlement. - Action to dismiss; nothing can be inside when dismissed. - No attunement required.