Activated abilities of artifacts can't be activated.

: Put a +1/+1 counter on target creature you control.
Whenever one or more +1/+1 counters are put on a creature you control, put that many growth counters on this enchantment.
At the beginning of your upkeep, if this enchantment has twenty or more growth counters on it, you win the game.

Enchant creature
Enchanted creature gets +1/+1 and has protection from creatures.

, : Add .

Destroy target creature or planeswalker.

Each opponent can't cast noncreature spells with mana value greater than the number of lands that player controls.
Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.

Equipped creature gets +1/+1 for each color among permanents you control.
As long as this Equipment is attached to a creature, your opponents can't cast spells during your turn.
Equip

Spree (Choose one or more additional costs.)
+ — Copy target instant spell, sorcery spell, activated ability, or triggered ability. You may choose new targets for the copy.
+ — Change the target of target spell or ability with a single target.

Choose target spell or permanent that's red or green. Its owner puts it on their choice of the top or bottom of their library.

: Return this card from your graveyard to the battlefield tapped.

Shadow (This creature can block or be blocked by only creatures with shadow.)
If a card would be put into an opponent's graveyard from anywhere, instead exile it with a void counter on it.
, Sacrifice this creature: Choose an exiled card an opponent owns with a void counter on it. You may play it this turn without paying its mana cost.

Grapeshot deals 1 damage to any target.
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Sliver creatures you control have flying and haste.

: Add .
: Add or . This artifact deals 1 damage to you.

Take an extra turn after this one. At the beginning of that turn's end step, you lose the game.

Sacrifice another creature or artifact: Put a +1/+1 counter on Hammerhead.

When this creature enters, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your library and the rest on the bottom of your library in a random order. If X is greater than or equal to the number of cards in your library, you win the game. (Each in the mana costs of permanents you control counts toward your devotion to blue.)

Add .

Whenever a commander you control deals combat damage to an opponent, it deals that much damage to each other opponent.
Partner (You can have two commanders if both have partner.)

When you cast this spell, you gain half X life and draw half X cards. Round down each time.
Flying, trample
This creature enters with X +1/+1 counters on it.

, : Add .

: Exile target card from a graveyard. If it was a creature card, put a +1/+1 counter on this creature and you gain 1 life.

Lightning Strike deals 3 damage to any target.

Destroy target artifact. It can't be regenerated. Create X 1/1 green Saproling creature tokens, where X is that artifact's mana value.

Whenever equipped creature deals combat damage to a player, you may draw two cards. If you do, discard a card.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Creatures you control have ": Add one mana of any color."

Counter target instant or sorcery spell.
Transmute (, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

, : Add .

Add .
Threshold — Add instead if there are seven or more cards in your graveyard.

This creature enters with X +1/+1 counters on it.
If one or more +1/+1 counters would be put on another creature you control, that many plus one +1/+1 counters are put on it instead.
, Remove a +1/+1 counter from this creature: Put a +1/+1 counter on another target creature you control.

Choose two target creatures controlled by different players. Return those creatures to their owners' hands.

Players have no maximum hand size.
, : Each player draws X cards.
, : Each opponent mills cards equal to the number of cards in their hand.

Whenever an opponent discards a creature card, create a 2/2 black Zombie creature token.
Whenever an opponent discards a land card, add .
Whenever an opponent discards a noncreature, nonland card, draw a card.

Destroy target nonartifact creature.

, : Scry 1, then draw a card. This ability costs less to activate for each legendary creature you control.