Lands you control are Plains.
Nonland permanents you control are white. The same is true for spells you control and nonland cards you own that aren't on the battlefield.
You may spend white mana as though it were mana of any color. You may spend other mana only as though it were colorless mana.

Other Goblins get +1/+1 and have mountainwalk.

Target player untaps all basic lands they control.

, Pay 1 life: Counter target black spell.

Whenever you cast an enchantment spell, you may draw a card.

Each player creates a 1/1 green Cat creature token for each untapped Forest they control.

Draw four cards. You lose half your life, rounded up.

, : Draw a card, then discard a card.

Hammer of Bogardan deals 3 damage to any target.
: Return this card from your graveyard to your hand. Activate only during your upkeep.

Creatures you control have haste. (They can attack and as soon as they come under your control.)

Exile target nonwhite attacking creature. You gain life equal to its toughness.

, : Target player discards a card. Activate only during your turn.

Search your library and graveyard for five cards and exile the rest. Put the chosen cards on top of your library in any order. You lose half your life, rounded up.

Creatures can't be the targets of spells.

Defender (This creature can't attack.)
Flying
This creature can't block creatures with power 2 or less.

When this creature enters, create three 0/1 black Serf creature tokens.
When this creature leaves the battlefield, exile all Serf tokens.

As this creature enters, it becomes your choice of a 3/3 artifact creature, a 2/2 artifact creature with flying, or a 1/6 Wall artifact creature with defender in addition to its other types. (A creature with defender can't attack.)

When this creature enters, sacrifice it unless you discard a card at random.

Change the target of target spell with a single target.

Destroy all artifacts. They can't be regenerated.

You and target player exchange control of the creature you each control with the greatest mana value. Then exchange control of artifacts the same way. If two or more permanents a player controls are tied for greatest, their controller chooses one of them.

, Sacrifice this artifact: Create X 1/1 green Snake creature tokens. Activate only as a sorcery.

, : Tap target creature. This creature deals damage equal to its power to that creature.

All Forests are 1/1 creatures that are still lands.

Black spells you cast cost more to cast.

Each player draws a card for each creature card in their graveyard.

Each player shuffles their hand and graveyard into their library. You exile the top ten cards of your library. Then each player draws up to seven cards.

, : Target opponent reveals their hand and discards a creature card at random. Activate only during your turn.

Flying (This creature can't be blocked except by creatures with flying or reach.)

: Reveal the top card of your library. If it's a creature card, put it onto the battlefield. Otherwise, put it into your graveyard.

: The next time a source of your choice would deal damage to target creature this turn, that source deals that damage to you instead.

, : Target creature gains flying until end of turn.

, : The next time a source of your choice would deal damage to you this turn, prevent that damage.

, , Sacrifice this artifact: Search target opponent's library for a card and exile it. Then that player shuffles. Until the beginning of your next upkeep, you may play that card. At the beginning of your next upkeep, if you haven't played it, put it into its owner's graveyard.

Reveal the first card you draw each turn. Whenever you reveal a basic land card this way, draw a card.

, Pay 2 life: Draw a card.