Krumblor as he appears during a Dragonflight or Dragon Harvest.

Krumblor the cookie dragon is a widget that was added in v1.9 of Cookie Clicker. By sacrificing cookies and buildings to Krumblor, the player will unlock selectable auras which provide various benefits in the game. An aura can be selected by clicking on the dragon. Switching auras costs one of the highest tier building owned.

To unlock Krumblor, the player must purchase the Heavenly Upgrade 'How to bake your dragon', which in turn unlocks the upgrade 'A crumbly egg' in all subsequent playthroughs.


Dragon upgrades
Icon Name Unlock condition Base price Description ID
How to bake your dragon How to bake your dragon
(heavenly upgrade)
"Legacy" purchased MoneyHC 9 Allows you to purchase a crumbly egg once you have earned 1 million cookies.
"A tome full of helpful tips such as 'oh god, stay away from it', 'why did we buy this thing, it's not even house-broken' and 'groom twice a week in the direction of the scales'."
Dragon egg v15 A crumbly egg 1 million cookies earned and "How to bake your dragon" purchased Money 25 Unlocks the cookie dragon egg.
"Thank you for adopting this robust, fun-loving cookie dragon! It will bring you years of joy and entertainment.
Keep in a dry and cool place, and away from other house pets. Subscription to home insurance is strongly advised."
DragonCookie Dragon cookie "Bake dragon cookie" dragon training completed Money 70 quadrillion Cookie production multiplier +5%.
"Imbued with the vigor and vitality of a full-grown cookie dragon, this mystical cookie will embolden your empire for the generations to come."

Dragon StagesEdit

Appearance Title Available action/description Sacrifice
Dragon egg Chip it 1 million cookies
2 million cookies
4 million cookies
Shivering dragon egg Hatch it 8 million cookies
Krumblor, cookie hatchling Train Breath of Milk
Aura: kittens are 5% more effective
16 million cookies
Train Dragon Cursor
Aura: clicking is 5% more effective
100 Cursors
Train Elder Battalion
Aura: grandmas gain +1% CpS for every non-grandma building
100 Grandmas[note 1]
Train Reaper of Fields
Aura: golden cookies may trigger a Dragon Harvest
100 Farms
Krumblor, cookie dragon Train Earth Shatterer
Aura: buildings sell back for 50% instead of 25%
100 Mines
Train Master of the Armory
Aura: all upgrades are 2% cheaper
100 Factories
Train Fierce Hoarder
Aura: all buildings are 2% cheaper
100 Banks
Train Dragon God
Aura: prestige CpS bonus +5%
100 Temples
Train Arcane Aura
Aura: golden cookies appear 5% more often
100 Wizard towers
Train Dragonflight
Aura: golden cookies may trigger a Dragonflight
100 Shipments
Train Ancestral Metamorphosis
Aura: golden cookies give 10% more cookies
100 Alchemy labs
Train Unholy Dominion
Aura: wrath cookies give 10% more cookies
100 Portals
Train Epoch Manipulator
Aura: golden cookie effects last 5% longer
100 Time machines
Train Mind Over Matter
Aura: +25% random drops
100 Antimatter condensers
Train Radiant Appetite
Aura: all cookie production multiplied by 2
100 Prisms
Train Dragon's Fortune
Aura: +123% CpS per golden cookie on-screen
100 Chancemakers
Train Dragon's Curve
Aura: sugar lumps grow 5% faster, 50% weirder
100 Fractal engines
Train Reality Bending
Aura: 10% of every other aura, combined
100 Javascript consoles
Krumblor, cookie dragon Bake dragon cookie
50 of every building
Train secondary aura
Lets you have two dragon auras simultaneously
200 of every building
Your dragon is fully trained


Icon Aura Name Description Base Aura Effect w/Reality Bending
Breath of Milk
Breath of Milk Kittens are 5% more effective. Milk Multiplier: 1.05 1.055
Dragon Cursor
Dragon Cursor Clicking is 5% more effective. Click Multiplier: 1.05 1.055
Elder Battalion
Elder Battalion Grandmas gain +1% CpS for every non-grandma building. Grandma Multiplier: 1 + (0.01 x (N - G)) 1 + (0.011 x (N - G))
Reaper of Fields
Reaper of Fields Golden cookies may trigger a Dragon Harvest. 19.25% chance of adding to effect pool
5% chance if grandmapocalypse
5% [note 2]
Earth Shatterer
Earth Shatterer Buildings sell back for 50% instead of 25%. Sellback Rate: 50% 52.5%
Master of the Armory
Master of the Armory All upgrades are 2% cheaper. Discount Multiplier: 0.98 0.978
Fierce Hoarder
Fierce Hoarder All buildings are 2% cheaper. Discount Multiplier: 0.98 0.978
Dragon God
Dragon God Prestige CpS bonus +5%. Prestige Multiplier: 1.05 1.055
Arcane Aura
Arcane Aura Golden cookies appear +5% more often. Golden Spawn Multiplier: 1.05 1.055
Dragonflight Golden cookies may trigger a Dragonflight. 19.25% chance of adding to effect pool
5% chance if grandmapocalypse
5% [note 2]
Ancestral Metamorphosis
Ancestral Metamorphosis Golden cookies give 10% more cookies. Golden Gain Multiplier: 1.1 1.11
Unholy Dominion
Unholy Dominion Wrath cookies give 10% more cookies. Wrath Gain Multiplier: 1.1 1.11
Epoch Manipulator
Epoch Manipulator Golden cookies last 5% longer. Golden Time Multiplier: 1.05 1.055
Mind Over Matter
Mind Over Matter Random drops are 25% more common.[note 3] Random Drop Multiplier: 1.25 1.275
Radiant Appetite
Radiant Appetite All cookie production multiplied by 2. Production Multiplier: 2 2.1
Dragon's Fortune
Dragon's Fortune +123% CpS per golden cookie on-screen, multiplicative.[note 4] Golden CpS Multiplier: 2.23 2.353
Dragon's Curve
Dragon's Curve +5% sugar lump growth and sugar lumps are twice as likely to be unusual. Sugar Lump Aging Multiplier: 1.05
Sugar lump type selection: 1 reroll
Multiplier: 1.055
Rerolls: 1 guaranteed, 10% chance to get 2.
Reality Bending
Reality Bending One tenth of every other dragon aura, combined.

If another aura is active, ignore its effect in this list and see the "w/Reality Bending" column for their combined effect.

  • Milk Multiplier: 1.005 
  • Click Multiplier: 1.005 
  • Grandma Multiplier: 1 + (0.001 x (N - G)) 
  • Dragon Harvest: 0.5-1.925% chance to pool
  • Sellback Rate: 27.5% 
  • Upgrade Discount Multiplier: 0.998 
  • Building Discount Multiplier: 0.998 
  • Prestige Multiplier: 1.005 
  • Golden Spawn Multiplier: 1.005 
  • Dragonflight: 0.5-1.925% chance to pool
  • Golden Gain Multiplier: 1.01 
  • Wrath Gain Multiplier: 1.01 
  • Golden Time Multiplier: 1.005 
  • Random Drop Multiplier: 1.025 
  • Production Multiplier: 1.1 
  • Golden CpS Multiplier: 1.123 
  • Sugar Lumps: aging multiplier of 1.005;
    10% chance to reroll type selection


If a player is going for the overall highest CPS boosts with auras, a combination of Breath of Milk and Radiant Appetite will produce the largest CPS increase. If a player is going for harvesting as many sugar lumps as possible, they should use a combination of Dragon's Curve and Reality Bending, as it reduces the maturation time and increases unusual lump rate the most.


This image shows the multiplier for the Breath of Milk dragon aura, based on the milk percentage and which kitten upgrades are active (up to kitten experts). In each group of 4 lines, grouped by color, the bottom line is the base multiplier, the next line is the multiplier with Santa's milk and cookies, the next line is the multiplier with Kitten angels, and the top line is the multiplier with both. The lines for each kitten upgrade assume that all previous kitten upgrades are active as well.

The overall effect of Dragon Cursor depends on how much the player clicks the Big Cookie, but as a rough estimate, with all upgrades, they will make approximately 1% more cookies at 2 clicks per second, 2% at 4 clicks per second, 3% at 10 clicks per second, 4% at 25 clicks per second, 4.5% at 55 clicks per second, and 4.9% at 300 clicks per second.

With optimal building distribution, Elder Battalion will give an overall production increase of about 1%. It can increase total production in the early game by a 5 fold after the Grandmapocalypse. This will become less significant the further the player progresses in the game. It can, however, be used to obtain the achievements "Gushing grannies" (bake 10 quintillion cookies with grandmas), "Panic at the bingo" (bake 100 septillion cookies with grandmas), and "Frantiquilities" (bake 1 decillion cookies with grandmas) quicker, due to having a larger general CpS buff to grandma CpS than Radiant Appetite, Dragon's Fortune, and Dragon Harvest.

The overall effect of Reaper of Fields has not yet been calculated, but will eventually be included in Expected Long Term Cookie Production.


Earth Shatterer should be used before selling all buildings, using the Chocolate egg, and ascending.

The overall effect of Dragon God scales up to 5% with Prestige, as shown in this image on a log scale.

The overall effect of Arcane Aura has not yet been calculated, but will eventually be included in Expected Long Term Cookie Production. A rough estimate is about 5% for active play.

Detailed calculations for Dragonflight will eventually be included in Expected Long Term Cookie Production. A rough estimate is a 150% increase in click-based production, which translates roughly to a 20% increase at 1 click per second, 35% at 2 clicks per second, 50% at 3 clicks per second, 60% at 4 clicks per second, 80% at 7 clicks per second, 100% at 13 clicks per second, and 120% at 25 clicks per second.

Ancestral Metamorphosis and Unholy Dominion only affect Lucky and Chain cookies, which means their effects reduce fairly quickly with an active playstyle. The benefit of Ancestral Metamorphosis drops from about 8% with an idle playstyle, to 5% at 4 clicks per second, to 3% at 10 clicks per second, to 2% at 20 clicks per second, to 1% at 45 clicks per second.

The overall effect of Epoch Manipulator has not yet been calculated, but will eventually be included in Expected Long Term Cookie Production. A rough estimate is about 5%.

Radiant Appetite has a flat 100% bonus to all production. It easily produces the largest boost in production out of all the auras.

Dragon's Fortune can grant a multiplier of over 2 with one golden cookie on the screen. This can be coupled well with Force The Hand Of Fate. It is however risky to have this, due to golden cookies not being truly "permanent", in fact the bonuses can last not more than two or three times a Dragonflight, giving much less of a multiplier. It is still possible to force many golden cookies, find a Dragonflight cookie, and have a Dragonflight twice or even thrice as powerful as a regular one.

Dragon's Curve only affects sugar lumps, but they can be used to buy various improvements. See sugar lump strategy.

Reality Bending has many effects, and may depend on the 2nd aura. The overall effects have not yet been calculated, but will eventually be included in Expected Long Term Cookie Production.


Icon Name Description ID
Dragon egg v15 Here be dragon Complete your dragon's training. 222


  1. Sacrificing grandmas fulfills the unlock condition of the "Just Wrong" achievement.
  2. 2.0 2.1 Having the aura Reality Bending active alongside this aura doesn't improve the chances of the golden cookie outcome.
  3. This affects garden upgrade drops, eggs during easter, and flavored seasonal cookies from Halloween and Christmas.
  4. This does not include the golden cookies created by a cookie storm.


  • The upgrade "How to bake your dragon" is a reference to the book (made into a movie) "How to Train your Dragon" by Cressida Cowell.
  • The aura "Dragon's Curve" is a reference to the family of fractals of the same name.
  • Krumblor will always appear below Santa.
  • Krumblor is also in the game AdventureQuest Dragons, which was made by Orteil in conjunction with Artix Entertainment.
  • The achievement "Here be dragon" is a reference to the phrase here be dragons.
Interactive Objects
Big Cookie
Golden Cookie
Wrath Cookie
Wrinkler - 1
Shiny wrinkler
Category:Interactive Objects

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