: Add .
, Pay 1 life: Add one mana of any color. Activate only if you control an artifact.

This creature enters with X +1/+1 counters on it.
: Put a +1/+1 counter on this creature.
Remove a +1/+1 counter from this creature: It deals 1 damage to any target.

Flying
Sacrifice Hope of Ghirapur: Until your next turn, target player who was dealt combat damage by Hope of Ghirapur this turn can't cast noncreature spells.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)
Target creature gets -X/-X until end of turn. You gain X life.

, , Tap X untapped artifacts you control: Look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

When this creature enters, pay (two energy counters). If you can't, return this creature to its owner's hand and you get .

Destroy X target artifacts. Create X 2/2 red Gremlin creature tokens.

Revolt — This creature enters with two +1/+1 counters on it if a permanent left the battlefield under your control this turn.

Whenever this creature attacks, you get (two energy counters).
Pay : Exile this creature, then return it to the battlefield under its owner's control.

As this creature enters, choose a creature type.
This creature is the chosen type in addition to its other types.
Each other creature you control of the chosen type enters with an additional +1/+1 counter on it.

Menace
Whenever this creature enters or attacks, you get (an energy counter).
At the beginning of your upkeep, you may pay . If you do, you draw a card and you lose 1 life.

Whenever you cast an Aura, Equipment, or Vehicle spell, draw a card.

First strike, menace
Whenever Kari Zev attacks, create Ragavan, a legendary 2/1 red Monkey creature token. Ragavan enters tapped and attacking. Exile that token at end of combat.

Permanents you control gain hexproof and indestructible until end of turn.

Instant and sorcery spells you cast cost less to cast.
Whenever a spell or ability you control counters a spell, you may draw a card. If you do, discard a card.

When Oath of Ajani enters, put a +1/+1 counter on each creature you control.
Planeswalker spells you cast cost less to cast.

Flying
When this Vehicle enters, you get (two energy counters).
Pay : This Vehicle gains lifelink until end of turn.
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.)

When Rishkar enters, put a +1/+1 counter on each of up to two target creatures.
Each creature you control with a counter on it has ": Add ."

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)
Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.

At the beginning of your upkeep, scry 1.
Whenever you cast a creature spell, you may pay . If you do, draw a card.

Whenever a nontoken artifact is put into your graveyard from the battlefield, return that card to your hand unless target opponent has this enchantment deal 3 damage to them.

Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.)

Haste
Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni.
Sacrifice another creature: Yahenni gains indestructible until end of turn.

Double strike
Revolt — At the beginning of your end step, if a permanent left the battlefield under your control this turn, put a +1/+1 counter on this creature.

Whenever this creature dies or another artifact you control is put into a graveyard from the battlefield, return to your hand target artifact card in your graveyard with lesser mana value.

: Another target Vehicle you control becomes an artifact creature until end of turn.
Crew 4 (Tap any number of creatures you control with total power 4 or more: This Vehicle becomes an artifact creature until end of turn.)

Gain control of target creature or Vehicle until end of turn. Untap it. It gains haste until end of turn.
You may cast a spell with mana value 2 or less from your hand without paying its mana cost.

Nonartifact spells you cast have improvise. (Your artifacts can help cast those spells. Each artifact you tap after you're done activating mana abilities pays for .)

All creatures get -3/-3 until end of turn.
You may cast a spell with mana value 3 or less from your hand without paying its mana cost.

When this creature enters, target artifact you control gains ": This artifact deals 2 damage to any target" for as long as you control this creature.

Other Aetherborn you control get +1/+1.
Whenever this creature or another Aetherborn you control dies, you draw a card and you lose 1 life.

When this creature enters, target artifact you control gains ": Draw a card" for as long as you control this creature.

Create three 1/1 colorless Servo artifact creature tokens.
You may cast a spell with mana value 3 or less from your hand without paying its mana cost.

Revolt — At the beginning of your end step, if a permanent left the battlefield under your control this turn, reveal the top card of your library. If it's a permanent card, you may put it onto the battlefield. Otherwise, you may put it on the bottom of your library.

Return up to three target artifacts and/or creatures to their owners' hands.
You may cast a spell with mana value 4 or less from your hand without paying its mana cost.

Exile target nonland card from your graveyard. Search your library for any number of cards with the same name as that card, reveal them, put them into your hand, then shuffle.