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Every week there is a promotion offering discounts or increased rewards.  The various discounts include gems, reinforced walls, traps that cost stone and yes, even imps. This page is to keep track of these different promotions. Promotions last one full week.

Regular Promotions[]

Accelerate Sale[]

All Acceleration costs are 50% off! - Includes rushing Rooms, Traps & Doors, Training Minions & Immortals, Reviving knocked out/captured Immortals and spawning minions (does not include guild withdrawals or deposits)

  • When upgrading the Dark Library, it will stop producing mana, leaving none for the player to collect until the upgrade is complete. While it is upgrading, you can't cast spells or gain spell XP, unless you buy mana with gems. It can be very beneficial to accelerate this building.
  • Accelerating minion summoning can also be very cheap and worth while.
  • If you are going to accelerate training times (or simply monitor them), be aware that training bonuses from guilds are not applied, until you watch a replay or look at another players dungeon or test your own dungeon. Make sure to do this immediately before accelerating the training.
  • Mines and Quarries do not produce gold and stone while being upgraded. Though the amount they provide isn't worth accelerating them for unless you are desperate for Imps.

Boost Sale[]

All Boost costs are 50% off! - Includes First Strike, Cave-In, Fortification, Scouting and DK Premium

  • Cave-In - Cannot be attacked by enemy Keepers. NOTE: Agreeing to an attack against an enemy Keeper will remove this Boost
  • First Strike - 120% Attacking minion damage, minion health, minion move speed and spell damage
  • Fortification - 120% Trap Damage, Trap Health, Room Damage, Room Health, Defending Minion Damage, Defending Minion Health, Defending Minion Move Speed. NOTE: Health increases do not affect Reinforced Walls.
  • Scouting - Reveals all Hidden Traps during raids
  • DK Premium - 140% Gems from Exclusive Raids, Gold from Raids, Stone from Raids, Combat Points from Raids, Mana Production, Gold Production, Stone Production.
  • At the time of buying make sure you are in a guild that is at least level 40, so you can take advantage of the 20% increase in boost duration. This is especially valuable when purchasing DK Premium for 100 days, since you will get a bonus of 20 days.
  • Buying the 100 day DK premium during this sale costs 5000 gems, instead of 10,000.
  • On the last day of the sale, you can buy 7 day sales to last you the whole of the next week.
Boost Normal
Cost
Promo
Cost
Time with
no guild perks
Guild Perk
Level 1 - 2%
Guild Perk
Level 2 - 5%
Guild Perk
Level 3 - 10%
Guild Perk
Level 4 - 20%
DK Premium 1 day 150 75 1d 1d 1h 12m 1d 4h 48m
DK Premium 3 days 400 200 3d 3d 3h 36m 3d 14h 24m
DK Premium 7 days 750 375 7d 7d 8h 24m 8d 9h 36m
DK Premium 100 days 10,000 5,000 100d 102d 105d 110d 120d
Cave-In 1 day 100 50 1d 1d 1h 12m 1d 4h 48m
Cave-In 3 days 250 125 3d 3d 3h 36m 3d 14h 24m
Cave-In 7 days 500 250 7d 7d 8h 24m 8d 9h 36m
First Strike 1 day 100 50 1d 1d 1h 12m 1d 4h 48m
First Strike 3 days 250 125 3d 3d 3h 36m 3d 14h 24m
First Strike 7 days 500 250 7d 7d 8h 24m 8d 9h 36m
Scouting 1 day 150 75 1d 1d 1h 12m 1d 4h 48m
Scouting 3 days 350 175 3d 3d 3h 36m 3d 14h 24m
Scouting 7 days 700 350 7d 7d 8h 24m 8d 9h 36m
Fortification 1 day 80 40 1d 1d 1h 12m 1d 4h 48m
Fortification 3 days 160 80 3d 3d 3h 36m 3d 14h 24m
Fortification 7 days 350 125 7d 7d 8h 24m 8d 9h 36m

Trap Sale[]

All Trap stone costs are 50% off! - Includes Spike Traps, Doors, Freeze Traps, Fireburst Traps, Poison Traps, Bug Zappers, Anti Air Traps, Cannon Traps & Dante’s Mounds

DOES NOT INCLUDE the Dreadstone purchase cost for Dante’s Mound which is 250 Dreadstones) and does not include Reinforced Walls, they have their own sale.

DOES NOT INCLUDE the Gold based traps which include Spring Traps, Chicken Bomb Traps, Boulder Traps, and U.R. Mines

  • At higher levels, traps can be very expensive. Take advantage of the promotion when upgrading higher level traps.
  • Remember to take into account the upgrading time. You may wish to upgrade more traps before the promotion ends.
  • Dante’s Mounds and Doors are often good choices to upgrade as they provide the most DCR out of all the traps, and their level is easiest to max out
  • Consider not upgrading very cheap traps, low level traps during this promotion when they can could easily be upgraded without the promotion

Reinforced Wall Sale[]

Reinforced Wall Sale! - 60% off Reinforced Walls - Only includes Reinforced Walls which are all instantly upgradable at all levels providing you have one imp available.

  • Upgrading walls that are higher levels will gain you the most benefit. At lower levels they can be upgraded with ease even without the special, can be a good way to dump stone.
  • It can be a good idea to focus on getting individual walls to level 13, which require at least two bombs, even at max spell level.
  • During this promotion, gathering stone is very difficult as most players are spending their stone on walls, leaving little to plunder.
  • During this promotion, try and leave one Imp idle for upgrading walls.
  • Try getting your walls to at least level 13, these walls require 2 bomb walls to break with the highest bomb wall spell level
  • If you are in the late game, getting your walls to level 17 will require 3 bomb walls to break with the highest bomb wall spell level
  • Focus on your higher level walls, this will reap the most benefit

Spell XP Promotion[]

Players can earn 2x the experience when casting spells. Can sometimes be different amounts, it has been up to 5x before.

  • When you have spare mana and you are not raiding, you can go into campaign dungeons and use spells, then leave. You will still get experience.
  • Try to be in a guild that is high level to get the reduced spell experience perk, this will automatically apply when you join a guild. A spell can level up purely just by joining such a guild.
  • Try to use spells that are close to leveling up.
  • Think twice before upgrading your library during this special...unless you plan to accelerate it

Resource Sale[]

Resource Sale! - Purchasing Gold & Stone is 35% off

  • This is still very expensive to do, even with the special. Recommended to only use it when your desperate, or if you are rich in real life.
  • This promotion doesn’t not scale well with higher level dungeons, and the developers are aware of this, though are not able to fix it.

Imp Sale[]

40% off Imps - Reduces the cost of purchasing Imps with Gems

  • It is recommended to wait until this promotion occurs to purchase Imps
  • Buying your first pack of gems will provide you with one free Imp. This is added instantly and cannot be used later
  • If possible, wait until you have 5 imps before purchasing gems to get the 6th Imp free, this will save you the most amount of gems (4200 gems)
  • It will take you a couple of days of playing regularly from a new account to afford to buy the 3rd Imp without the promo, with the promo it could be done on the same day easy enough
  • Join a high level guild to maximize your slap boost time as much as possible
Imp
Count
Cost
(Gems)
Promo
Cost
(Gems)
Promo
Savings
(Gems)
1st Free Free 0
2nd 200 120 80
3rd 800 480 320
4th 1,200 720 480
5th 2,100 1,260 840
6th 4,200 2,520 1,680
Total 8,500 5,100 3400

Rare Promotions[]

These occur very rarely

Immortal Sale[]

50% off Immortals - Immortals that cost gems to purchase are reduce in cost by 50%, immortals that cost dreadstones are unaffected

  • Wait until this promotion to buy immortals with gems, you will save a lot in gems
  • Immortals that cost dreadstones are not affected by this promotion

DRAW TABLE WITH IMMORTALS, NORMAL GEM COST AND PROMO GEM COST

Guild Event - Free For All![]

Guild Event - Free For All - All Tournament Star bonuses will be reduced to 1, including all DCR, Dungeon Heart, League of Evil, and Victory Star multiplier bonuses. The Star count required for a Guild to qualify is reduced to 10 link

Specific Spell Bonus and XP Promotion[]

Specific spells can receive 3x to 4x the XP. Some also may get an extra cast. For example, the Disable Trap spell can have 1+ extra cast each time it is used.

  • Cast the specific spell as much as you can!
  • Even if you have maxed the specific spell, you get an extra cast.
  • Can be useful for completing campaigns that you are struggling with

Guild Power Up Event[]

Guild Power Up - all Guild Minion Donation and Withdraw times are reduced by 50%. This event has only occurred once, on the week of 17th of September 2019

This is a very rare event

Room Sale[]

All rooms are 50% off upgrading except Dungeon Hearts, Guild Lairs, and Guard Rooms.

  • This promotion has only started appearing 4 years after the games release.
  • Focus on upgrading stone and gold storage beforehand. These rooms at later levels require that mines and quarries be upgraded to reach the storage amount (100k each time). That way you can by pass upgrading the mines for some time, yet still get the storage you need.
  • Ensure you Dungeon Heart is kept at it's highest level at all times in case this promotion comes about. That way you can upgrade what you want without the Dungeon Hearts restrictions, as it is also not a part of the promotion.
  • If you were upgrading other rooms before the sale, and you cancel them. You will only get 25% back of what you spent as it calculates at the promotions price, not the one prior.

Times that the Room Sale has occurred:

  • Week of 8th of April 2020
  • Week of 24th of December 2019
  • Week of 26th of November 2019
  • Week of 27th of August 2019
  • Week of 28th of May 2019
  • Week of 14th of November 2018
  • Week of 31st of July 2018

Powerup Promotions[]

These are fairly common promotions, though each one only occurs about once to two times per year.

Trap Powerups[]

Minion Powerups[]

Specific minions can receive bonuses during this promotion. For example, in August 2018 the Warlock received 1+ Range and 50% bonus DMG

  • This promotion can be good only if the specific minion is at a decent level.
  • Can be a good idea to rearrange your dungeon when these promotions occur. For example, a warlock that can fire over 3 walls instead of 2 can yield devastating results, depending on your dungeon.
  • Skeleton - No known power up promotion
  • Warlock - Deals +50% damage, Attack speed doubled and Weakness to Poison removed link or
  • Necromancer - 50% Health and Raises Warlocks instead of Skeletons. Note: Warlocks do not drop Tombstones during this Event link
  • Vampire - Increased damage by 150% link
  • Mistress - x2 health, AoE shock radius and duration doubled, and Efficiency Duration Doubled link
  • Dragon Whelp - Damage increased by 50% on opening attack and does not trigger freeze traps or bug zappers link
  • Ghost - Increased health by 250% and increased damage by 75% link
  • Bile Demon - Increased health by 40% and increased movement speed by 25% link
  • Troll - Increased health by 25% and increased movement speed by 25% link

Immortal Powerups[]

Specific immortals can receive bonuses during this promotion. For example, in July 2018m, Deeg & Dugger received 2x bonus move speed & 3x digging damage.

  • The benefits of this promotion depend on the immortals level.
  • When immortals had a max level of 35, they received a special bonus if you had the immortal at that level.
  • Currently, these promotions have been stopped as the immortal patch that allows them to be upgraded to level 40 still requires balancing.
  • Tiny - ?
  • Horny - x2 Damage, x2 AoE Range, and x2 AoE Max Targets link
  • Mortimer - 2x Speed and 2x Health link
  • Magmaw - ?
  • Sir Cophagus - ?
  • Deegg & Dugger - Increased movement speed by 50% and increased burrow damage by 50% link + older link
  • Glarrgl - Increased health by 50%, increased room disable duration by 50% and mystery bonus for level 40 Glarrgl’s link
  • Swampus - Damage to resource rooms is tripled, takes 75% less damage from traps and buildings, plus a special bonus if it is level 40 link + older link

League of Evil - Earn 2x League of Evil Rewards![]

Not sure what this is

  • This promotion must be very old, possibly irrelevant now.
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