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The Caverns Below
41222 • UNG_067
UNG 067.png
Dimensions: Full330 x 410px
UNG 067 Premium1.png
Dimensions: Full330 x 410px
Set:Journey to Un'GoroJourney to Un'Goro
Cost:1 Mana icon.png
Artist:James Ryman
Quest: Play four minions with the same name. Reward: Crystal Core.
Flavor text

Why can't it ever be The Taverns Below?

Boolean tags
Wiki tags
Generate, Quest (ability)
Wiki referenced tags
Spell-generating, Triggered effect
Arena, Card generation, Duels card buckets
External links


The Caverns Below is a legendary rogue spell card, from the Journey to Un'Goro set.

How to get[]

Auto-detected sources
Card packs
Journey to Un'Goro Pack
Wild Pack
Regular, Golden1~2
Crafting1600 dustdustRegular1
Crafting3200 dustdustGolden1

Generated cards[]

Crystal Core


  • The Caverns Below counts minions played, not minions summoned. This means that minions such as Doppelgangster will trigger only once, and not three times, for the quest.[1][2] In summary, minions' names will only be counted for advancing the quest if the minions were played from the hand.
  • The quest progress counts any minions that have the same name, even if they are not the exact same minion. For example, playing from hand an Imp token created by Imp Master and an Imp token created by Imp-losion would count as playing 2 minions of the same name, despite the two Imps' difference in source and card art. Similarly, playing a Doppelgangster, returning one of the uncollectible copies to one's hand and then playing the copy again would count as 2 minions of the same name.[3][4]
  • Upon playing Crystal Core, all friendly minions in the player's hand, deck and battlefield get set to 5/5 stats, and any friendly minion summoned/transformed/taken control of thereafter will be set to a 5/5 the next time Auras update, if it has not been set to a 5/5 this way yet. Afterwards, minions can still take damage, get buffed and activate their triggered effects, Battlecries and Combos like normal; they will simply start out with 5/5 stats by default.[5][6][7][8][9][10] This includes tokens created by cards such as Violet Teacher and Onyxia, copies of other friendly minions created by Barnes and Shadowcaster, and transformed minions created by spells such as Polymorph and Hex.[7][11][12][13][14]
    • All Jade Golems summoned after playing Crystal Core will be 5/5 minions.[15]
    • Taking control of an enemy minion after playing Crystal Core, such as using Sylvanas Windrunner's Deathrattle or a randomly generated Potion of Madness, will cause that minion's stats to immediately be changed to 5/5.[16] They will stay a 5/5 even after returning to the enemy player's side of the board.[17]
    • Silencing a minion affected by Crystal Core will remove all enchantments and card text except the Crystal Core enchantment, meaning that the minion's stats will remain 5/5.[18][19] (It's hypothesized that the enchantment is being removed but re-applied instantly - so rather than it being unsilencable, it's added back too quickly for anyone to notice.)[20]
    • Cards that create 1/1 copies of minions, like Herald Volazj and Mirage Caller, are hard-coded to not copy the Crystal Core buff. As a result, the Crystal Core buff is re-applied afterwards, so the copies will be 5/5, not 1/1.[21] (The copies used to be 1/1s before Patch 8.2.)[22]
    • If you have a Sword of Justice/Addled Grizzly and Crystal Core and play or summon a minion, it will become a 5/5.[23] (Before Patch 8.2, merely summoned minion would get buffed +1/+1 THEN become a 5/5.)[24]
August 2019 consistency change
  • The buffing mechanic of Crystal Core was reworked in Patch to correct some inconsistencies.[25]
    • Now, after Crystal Core is played, the base stats for all of the player's minions are changed to 5/5's. This means that the stat numbers for these minions now appear as white instead of green, and if silenced or stolen, the minions will still remain as 5/5's.
    • Also, when Crystal Core is played, minions currently in play on the board receive a one-time enchantment that sets their stats to 5/5, clearing damage and overriding enchantments that were already in place.
  • Additionally, cards which create a copy of a minion with specifically stated stats (e.g. Sonya Shadowdancer, Prince Taldaram, Barnes, etc.) now work as written, since new enchantments from such minions override the Crystal Core enchantment. In summary, Crystal Core no longer acts as a persistent aura effect as in previous versions of the card.
    • For example, the minion summoned by Barnes will be a 1/1, instead of a 5/5.


An effective way to complete The Caverns Below is to use return to hand effects such as Youthful Brewmaster, Shadowstep, Cheat Death, Vanish as well as cards that create copies of other cards, such as Mimic Pod, Sonya Shadowdancer and Zola the Gorgon. For a list of all cards with return and copy effects, see return to hand and copy.

You can also complete this quest using the Flame Elemental tokens generated by Igneous Elemental and Fire Fly. Not only do these quickly place minions with the same name into your hand, they generate 1 mana 5/5s once the quest is complete, and have Elemental synergy.

Crystal Core is one of the trickier Quest rewards to make use of. It has obvious synergy with cheap, low-statted minions like Bloodmage Thalnos or low-statted minions with strong effects or keywords like Elven Minstrel, Wax Elemental, and Vicious Scalehide. On the flip-side, it has severe anti-synergy with many high-cost minions, as most will be reduced in stats or gain little to no benefit. Low-cost charge minions like Stonetusk Boar and Southsea Deckhand are extremely effective with Crystal Core, which make up the bulk of the damage dealing and allows return-to-hand effects to remain highly effective. Other cheap token-generating minions such as Violet Teacher and Moroes can also work well with it.

Because the quest reward is a spell, Preparation is very useful for playing the reward earlier.


The crystals of Un'Goro Crater are ancient titan energy sources. The Crystal Core is a particularly powerful one, and represents infusing the affected minions with titan energy, comparable to the opposite of Old God corruption, "except that you look like a Norse god at the end instead of a tentacle monster. A 5/5 Norse god."[26][27][28]



The Caverns Below, full art

Patch changes[]

  • Forged in the Barrens logo.pngPatch (2021-03-25):
    • Condition changed from "Play five minions with the same name." to "Play four minions with the same name."
    • Crystal Core now reads "For the rest of the game, your minions are 5/5." (Up from 4/4).
  • The Witchwood logo.png Patch (2018-05-22): Crystal Core now reads "For the rest of the game, your minions are 4/4." (Down from 5/5).
  • Journey to Un'Goro logo.png Patch (2017-07-10): Condition changed from "Play four minions with the same name." to "Play five minions with the same name."
  • Journey to Un'Goro logo.png Patch (2017-04-04): Added.


  1. Peter Whalen on Twitter. (2017-03-22). 
  2. Peter Whalen on Twitter. (2017-03-22). 
  3. Peter Whalen on Twitter. (2017-03-22). 
  4. holden yip (2017-04-13). Hearthstone Experiment: Can we finish the Rogue Quest by same name DIFFERENT cards? - YouTube
  5. Peter Whalen on Twitter. (2017-03-22). 
  6. Peter Whalen on Twitter. (2017-03-22). 
  7. 7.0 7.1 Peter Whalen on Twitter. (2017-03-22). 
  8. Peter Whalen on Twitter. (2017-03-22). 
  9. Peter Whalen on Twitter. (2017-03-22). 
  10. Peter Whalen on Twitter. (2017-03-22). 
  11. Peter Whalen on Twitter. (2017-03-22). 
  12. Peter Whalen on Twitter. (2017-03-22). 
  13. Peter Whalen on Twitter. (2017-03-22). 
  14. https://youtu.be/SDKrjs7TfQg?t=662
  15. Peter Whalen on Twitter. (2017-03-23). 
  16. Peter Whalen on Twitter. (2017-03-29). 
  17. https://www.reddit.com/r/hearthstone/comments/64dbx3/til_if_a_rogue_with_a_crystal_core_uses_shadow/
  18. Peter Whalen on Twitter. (2017-03-29). 
  19. Trolden (2017-04-08). Funny And Lucky Moments - Hearthstone - Ep. 237
  20. https://github.com/HearthSim/hs-bugs/issues/716#issuecomment-306797145
  21. https://github.com/HearthSim/hs-bugs/issues/716#issuecomment-306797145
  22. https://github.com/HearthSim/hs-bugs/issues/716
  23. https://github.com/HearthSim/hs-bugs/issues/716#issuecomment-306797145
  24. https://www.reddit.com/r/hearthstone/comments/64dbx3/til_if_a_rogue_with_a_crystal_core_uses_shadow/dg240qd/
  25. Blizzard Entertainment (August 1, 2019). Hearthstone Update – August 1 – Saviors of Uldum. Retrieved on 2019-09-08.
  26. Peter Whalen on Twitter. (2017-04-27). 
  27. Peter Whalen on Twitter. (2017-04-27). 
  28. Peter Whalen on Twitter. (2017-04-27).