--- title: Legend of Defenders Hero Slots Locked? Quest Book Fixes description: Why a Legend of Defenders hero, captain, gem or Treasure slot stays locked after the Castle level is met, and how the quest book in the bottom-left corner unlocks it. url: https://legendofdefenders.com/castle/hero-slots-and-quests/ --- Problem · **slot locked** # Legend of Defenders hero slot locked? Use the quest book If a Legend of Defenders hero, captain, gem or Treasure slot stays locked after you reach the Castle level, open the **quest book in the bottom-left corner** and finish its current task. The Castle level makes the slot appear; the quest unlocks it. Quick answer - Hero slots: finish the bottom-left quest; the developer gave this answer at Castle 40, 70 and 90. - Captain slot: the quest after the fifth Treasure. - Gem and captain slots are all open once the quests up to wave 350 are done. - The last Treasure Altar slot is a quest too, not a tower floor. ## Why can't I deploy more heroes when the Castle level is high enough? Because two things gate each slot: the Castle level shows it, and a quest-book task opens it. Players at Castle 40 (3rd slot), Castle 70 and 90 (stuck at 4 heroes) all got the same answer from the developer: finish the defend quest in the bottom-left corner. - Click the **book icon in the bottom-left** of the battle screen. - Claim every finished task. Uncollected quests are the usual reason a slot stays shut: one player at Castle 600 had a pile of unclaimed quests. - Do the current task (often "defend wave N"). The slot opens when it is claimed. For reference, a fresh full-release save showed the 4th hero slot at Castle level 50[Nerfed Reflexes 21:49](https://www.youtube.com/watch?v=etJMFiRxGYo&t=1309s), and the store screenshot at wave 98 has five hero slots open and five locked. ## How do I unlock the captain slot and gem slots? The same way. The developer says the task after the fifth-Treasure quest unlocks the captain slot, and that this step is being made simpler in a later update. Players found the gem and captain slots all open once they had done the tasks up to wave 350; before that the Gem tab shows a greyed-out "Deploy". ## Why is the last Treasure Altar slot still locked? The tooltip mentions Demon Lord Tower floor 5, but the slot is a quest-book task. Finish the bottom-left quest and it opens. Another player with the fifth Treasure slot locked at tower floor 12 got the same answer from the community. "Get a Treasure" quests ask for one bought at the Altar: Treasures are passives you buy with gold, not drops. The Altar itself opens once a hero reaches level 155, then costs 10,000 gold.[AboboKnows 16:42](https://www.youtube.com/watch?v=oSpOuExSDiI&t=1002s) ## How does the quest book progress, and what is the last task? The quest book is the main story list. Its wave targets jump from 1,200 to 2,500 to 5,000 waves beaten, and players report that wave 5,000 is the final task. After that, progress is yours to set. Online rewards are separate and pay out once; the developer may refresh them for big events. ## "Hero not unlocked: please visit the Tavern". Where is it? That message means you don't own the hero yet. Heroes come from recruiting at the Tavern, the Recruit building in the top row (shortcut G). See [recruiting and diamonds](https://legendofdefenders.com/castle/diamonds-recruiting-and-mine/#tavern) for costs and odds. ## Legend of Defenders slot and quest questions ### Why can I only deploy 4 heroes in Legend of Defenders? The Castle level only shows the next slot. The slot itself opens when you finish the matching task in the quest book, the book icon in the bottom-left corner. The developer gives this answer to players stuck at Castle 40, 70 and 90. ### How do I unlock the captain slot? Through the quest book as well: the developer says the task after the fifth-Treasure quest unlocks the captain slot. ### Why is my last Treasure Altar slot locked after Demon Lord Tower floor 5? The last slot is also a quest-book task. Finish it in the bottom-left quest list and the slot opens. ### Where do I get a Treasure for the main quest? Buy one at the Treasure Altar with gold. Players who could not find "a Treasure" were looking for an item drop; Treasures are bought passives. ### What is the last quest-book task? Players report that beating wave 5,000 is the final quest-book challenge, after steps of 1,200, 2,500 and 5,000 waves. Related: [when every feature unlocks](https://legendofdefenders.com/guide/#unlocks) · [speed and the Wormhole](https://legendofdefenders.com/castle/speed-waves-and-wormhole/) · [captains](https://legendofdefenders.com/units/captains-turrets-cannons/) ## Videos used on this page - [This incremental idle TD is insanely good (Nerfed Reflexes)](https://www.youtube.com/watch?v=etJMFiRxGYo) - [The Tower Defense With NO LEVEL CAP Finally Released IN FULL! (AboboKnows)](https://www.youtube.com/watch?v=oSpOuExSDiI)