Activated abilities of artifacts can't be activated.

Exile target creature you control, then return it to the battlefield under its owner's control.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When this creature enters, choose target face-up exiled card. Its owner shuffles it into their library.

Changeling (This card is every creature type.)
Target creature gets +3/-3 and loses all creature types until end of turn.

Reveal cards from the top of your library until you reveal a nonland card, then put all cards revealed this way into your hand.

Target player shuffles up to three target cards from their graveyard into their library.
Draw a card.
When this card is put into your graveyard from your library, shuffle your graveyard into your library.

, , Sacrifice this creature: Return target creature card from your graveyard to the battlefield. That creature gains haste. At the beginning of the next end step, sacrifice it.

Whenever this creature attacks or blocks, other Humans you control get +1/+1 until end of turn.

Whenever equipped creature attacks, double its power until end of turn.
Equip

Vigilance (Attacking doesn't cause this creature to tap.)

Whenever this creature is dealt damage, you may create that many 1/1 green Insect creature tokens.
Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

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.

Flying
Whenever this Vehicle attacks or blocks, you may draw a card. If you do, discard a card.
Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

Landfall — Whenever a land you control enters, you may put a quest counter on this enchantment.
Remove three quest counters from this enchantment and sacrifice it: Draw two cards.

: Create a 1/1 green Saproling creature token.

: The next 1 damage that would be dealt to this creature this turn is dealt to target creature you control instead.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)
Target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Chandra's Pyrohelix deals 2 damage divided as you choose among one or two targets.

Counter target spell unless its controller pays .
Cycling (, Discard this card: Draw a card.)

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

Protection from red
Whenever a player casts a red spell, you may gain 1 life.

Equipped creature gets +1/+0 and has wither. (It deals damage to creatures in the form of -1/-1 counters.)
Equip

Enchant creature
Enchanted creature gets +2/+1 and has menace.

Untap two target creatures. Each of them gets +1/+1 until end of turn.

, : Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
At the beginning of your end step, if you control seven or more lands, transform this artifact.

Choose one —
• Destroy target artifact.
• Destroy target creature with defender.
• Smash to Dust deals 1 damage to each creature your opponents control.

This creature has shroud as long as you control no untapped lands. (It can't be the target of spells or abilities.)

Cats you control have protection from Rats. (They can't be blocked, targeted, or dealt damage by Rats.)
At the beginning of your end step, target opponent creates a 1/1 black Rat creature token with deathtouch.
Whenever a Rat dies, put a +1/+1 counter on each Cat you control.

: Add .

Each opponent sacrifices a creature of their choice with flying.

, : Draw a card, then exile a card from your hand. If cards with five or more different mana values are exiled with Azor's Gateway, you gain 5 life, untap Azor's Gateway, and transform it.

When this enchantment enters, target opponent sacrifices a creature of their choice.
When a Cartouche you control enters, return this enchantment to its owner's hand.

Choose one —
• Break Their Chains — Destroy target artifact.
• Interrogate Them — Exile the top three cards of target opponent's library. Choose one of them. Until the end of your next turn, you may play that card, and you may spend mana as though it were mana of any color to cast it.

Kicker (You may pay an additional as you cast this spell.)
When this creature enters, if it was kicked, return target instant or sorcery card from your graveyard to your hand.

Counter target spell. If the spell is countered this way, exile it with three time counters on it instead of putting it into its owner's graveyard. If it doesn't have suspend, it gains suspend. (At the beginning of its owner's upkeep, they remove a time counter. When the last is removed, they may play it without paying its mana cost. If it's a creature, it has haste.)