Number of players: 2-4
Game time: 30 minutes
Goal: to be the first player with two diamond cards.

In this turn-based card game you are a diamond miner. Trade in the iron ore found in your mine for more mining tools, and continue upgrading tools until you mine a diamond. But be careful not to let other players steal your tools! With planning and some plundering of your own, you can be the first in the race to mine the diamonds!

49 iron ore cards
19 shovel cards
9 mine cart cards
6 anvil cards

8 shield cards
8 sword cards
9 diamond cards

The fronts of iron ore cards can vary from card to card. The other card types do not vary.

Place all cards face down into piles, with one pile for each type of card.
Form the deck by shuffling the iron ore pile and placing it face down in the middle of the playing area. Leave room for an iron ore discard pile beside it.
Form the bank with separate piles of the remaining cards. Place it at the side of the playing area.
Choose the shortest player to go first.

Players take turns and you do the following on your turn:

Take new cards and place each one face up in front of you (see Taking New Cards below).
Move the cards in front of you under other cards, forming or adding to stacks, and possibly transforming stacks of cards into new cards (see Moving Cards into Stacks below). You can do this as many times as you like on your turn.

On your turn you take two iron ore cards from the top of the iron ore deck. In addition, for each of your stacks of cards that produce cards (see below) you take the cards indicated. Take iron ore cards from the top of the iron ore deck and other cards from the bank.
Place each of your new cards face up in front of you so that each player can see it.
When the iron ore deck is empty, shuffle the iron ore discard pile and form a new deck. Do not replenish the iron ore deck until it is exhausted.
If the bank runs out of a type of card simply skip taking that card.

You may move any of your cards underneath any other card, including under cards belonging to other players. (Except for another player’s anvil cards and except for stacks protected by shield cards — see below.)
You cannot move another player’s cards under other cards; you can only move your own cards under theirs (or yours).
When moving a card under a stack of cards, leave the top portion of the card visible so everyone can see which cards are in the stack.
Once a card is under another card, it cannot be moved. This applies to all cards, including shield and sword cards. You cannot move a card in the stack to the front of the stack. The card at the front cannot change.
Once a card is under another card, its rules are hidden and do not apply. Only the rules of the top card in the stack apply.
You may move the top card of a stack, but you immediately discard the all cards under it, except for shields or swords, when you do so.
You may move a card into any stack, even if it does not follow the rule to transform or produce cards. You would do so to prevent another player from using that card.

Example 1: Moving an iron ore card under a stack of two shovel cards, resulting in a stack of three cards.

Example 2: Moving one stack under another stack, moving only the top card and discarding the rest.

The front of each card lists the possible rules for when that card is the top of a stack. The required cards for a rule include the top card.
There are two types of rules: transformations and productions. Productions contain a plus sign inside a circle; transformations do not.
Other than the top card, the order of the cards in the stack does not matter.
Extra cards in the stack that are not needed to complete a rule are ignored.

When you place a card under a stack and complete a transformation rule, discard the stack and take new card(s) according to the rule.
If you place a card under another player’s stack and complete a transformation, the new card belongs to you!
Any extra cards that are not needed for the transformation are discarded along with the rest of the stack.
If a stack completes a transformation, you must transform it into the new card(s).
When discarding cards, place iron ore cards face up in the iron ore discard pile. Return all other cards to the bank.

Example 3: Moving this ore under the other produces a stack of two ores which transforms into a shovel.

Example 4: Moving an anvil card under this stack transforms the resulting stack into a diamond.

Cards are only produced at the beginning of your turn. At the beginning of each turn take any cards produced plus two iron ore cards.
Completing a production rule on a player’s stack has no effect until the beginning of that player’s next turn (and only if the stack remains).

Example 5: This player would take 4 iron ore cards and 1 shovel card in addition to the 2 iron ore cards they would normally take.

You cannot place a card under another player’s anvil cards. You can only place cards under anvil cards that belong to you.
The anvil card’s transformation rule lets you choose one of two possible options. It effectively lets you turn an iron ore into either a shield or a sword.

If you place a shield card under a stack then it prevents other players from placing their cards under that stack (except for sword cards).
If you place a sword card under a stack containing a shield card, both the shield and sword cards are removed from the stack and discarded.
You may place more than one shield card under a stack. A sword card removes only one shield card from a stack.
You may place a sword card under another player’s stack that does not contain a shield card. If a player later adds a shield card under the stack then both the sword and shield cards are removed and discarded.

Once a player obtains a diamond card they cannot lose it.
The game ends when a player receives their second diamond card.