What are Cards?
Cards are special items used for magical research in your mines. With them, you can:
Automate mining operations
Increase shaft income
Speed up goblin spawn and boost their efficiency
Earn more gold from rocks and barrels
Upgrade the Crusher mini-game
Boost event and chest rewards
Important: All upgrades unlocked with cards are permanent and stay with you when moving between mines. This makes them essential for long-term progress.
How to Get Cards
Cards can be obtained in several ways:
From regular and bonus chests found in mines
By clearing checkpoints and completing fixed shafts
From the in-game shop (with resources or real money)
As event rewards, if you collect enough keys
In the Crusher mini-game between mines
From chests after Mine 100 (for Ancestral Cards)
Some of the cards are more precious and hard to obtain than others. There are seven types of rarity: Common, Uncommon, Rare, Legendary, Epic, Majestic and Ancestral.
What can you upgrade with Cards?
Cards impact many aspects of the game. Here are the main upgrade categories:
1. Shafts and Automation
Common and Uncommon cards are used to upgrade jewels, assign managers, and automate shafts.
Higher card levels provide higher income.
2. Speed and Productivity
Speed up goblin spawn
Reduce goblin cost
Boost the speed of the shafts and the forge
3. Combat Bonuses
Some cards unlock critical hits for goblins, significantly increasing mining efficiency.
4. Resource Rewards
Increase gold earned from rocks, barrels, and checkpoints.
5. Crusher Enhancements
Boost the Crusher’s speed
Enable bomb launching
Amplify explosion effects and pickup range
6. Event Benefits
Increase rewards gained from collecting event keys
Improve overall efficiency in event mines
Notable Card Examples
Rare & Legendary Cards:
Crit Chance and Crit Damage – increase the frequency and strength of goblin critical strikes. Crit-strike cards can improve the speed of mining. When the crit bonus is unlocked, your goblins will sometimes land a strong hit with amplified damage. The Crit Chance card increases the frequency of crit strikes. While the Crit Damage card multiplies the damage dealt by those strikes.
Rocket Cart – boosts shaft and forge speed.
Iron Pickaxe / Special Delivery – increase gold from rocks and barrels.
Golden Hamlet – raises the goblin cap.
Golden Cannon – increases the level of newly hired goblins.
Epic Cards (Crusher & Chest Enhancements):
Crusher Speed – increases the speed of the Crusher Truck in the mini-game.
Crusher Bomb – unlocks automatic bomb throwing.
Booster Pack – adds more cards to each chest.
Big Boom / Rocks Gems Chance x2 – boosts gold and gem yield from rocks.
Goblin King - Majestic Card
The Goblin King is a unique Majestic card that unlocks a special boss goblin in the main mines.
- Obtained in Treasure Hunt
Requires 4 cards and elixir to summon
Permanently stays in the main game (not available in events)
Increases the damage of nearby goblins
Works especially well with crit-based setups
Ancestral Cards - late-game power
These cards appear only after Mine 100, once you've maxed out many regular cards.
How they work:
Any extra cards beyond max level are automatically converted into Ancestral Cards
The rarer the original card, the more Ancestral Knowledge you gain
These cards increase goblin and dynamite damage
Only active in the main game, not in events
Occasionally drops as a bonus from chests