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Krumblor, the cookie dragon when fully trained.

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 1 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 stages and auras Edit

Icon (dragon) Description (dragon) Cost/Sacrifice Icon (aura) Unlocks aura Description (aura)
DragonEggStage01 Dragon egg 25 (from purchasing "A crumbly egg") none
DragonEggStage02 1 million cookies
DragonEggStage03 2 million cookies
DragonEggStage04 Shivering dragon egg 4 million cookies
DragonHatchling Krumblor, cookie hatchling 8 million cookies
16 million cookies Auraofkittens Breath Of Milk Kittens are +5% more effective.
100 x CursorIconTransparent Auraofclicking Dragon Cursor Clicking is +5% more effective.
100 x GrandmaIconTransparent[note 1] Auraofrollingpin Elder Battalion Grandmas gain +1% CpS for every non-grandma building.
DragonAdultStage01 Krumblor, cookie dragon 100 x FarmIconTransparent Auraofwateringcan Reaper of Fields Golden cookies may trigger a Dragon Harvest (x15 CPS for 60 seconds).
100 x MineIconTransparent Auraofpickaxe Earth Shatterer Buildings sell back for 85% instead of 50%.
100 x FactoryIconTransparent Aurafcogs Master of the Armory All upgrades are 2% cheaper.
100 x BankIcon Auraofmoney Fierce Hoarder All buildings are 2% cheaper.
100 x TempleIcon Auraofshrine Dragon God Prestige CpS bonus +5%.
100 x WizardtowerIcon Auraofwizardry Arcane Aura Golden cookies appear +5% more often.
100 x ShipmentIconTransparent Auraofspaceships Dragonflight Golden cookies may trigger a Dragonflight (x1111 click power for 11 seconds).
100 x AlchemyLabIconTransparent Auraofgoldtocookies Ancestral Metamorphosis Golden cookies give 10% more cookies.
100 x PortalIconTransparent Auraofportals Unholy Dominion Wrath cookies give 10% more cookies.
100 x TimeMachineIconTransparent Auraoftime Epoch Manipulator Golden cookies last 5% longer.
100 x AntimatterCondenserIconTransparent Auraofballs Mind Over Matter Random drops are 25% more common.[note 2]
DragonAdultStage02 100 x PrismIconTransparent Auraofrainbows Radiant Appetite All cookie production multiplied by 2.
50 of every building Bake dragon cookie (cookie production multiplier +5%)
DragonAdultStage03 200 of every building Train secondary aura (lets you use two dragon auras simultaneously)

This image shows the multiplier for the Breath of Milk dragon aura, based on the milk percentage and which kitten upgrades are active. 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, he or she 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.

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.


  1. This will give the achievement 'Just wrong'.
  2. This affects eggs during easter and flavored seasonal cookies from Halloween and Christmas.

Trivia Edit

  • 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.
  • Krumblor will always appear below Santa.
  • Krumblor is also in the game AdventureQuest Dragons, which was made by Orteil in conjunction with Artix Entertainment.
Interactive Objects
Big Cookie
Golden Cookie
Wrath Cookie
Wrinkler - 1
Category:Interactive Objects

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