When this creature enters, you draw a card and you lose 1 life.

: Add . If you control an Urza's Mine and an Urza's Power-Plant, add instead.

: Add .

Enchant player
Creatures attacking enchanted player have trample.
Whenever a creature deals combat damage to enchanted player, that player exiles the top card of their library. Until end of turn, that creature's controller may play that card and they may spend mana as though it were mana of any color to cast that spell.

Destroy target permanent an opponent controls. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.

Whenever another artifact is put into a graveyard from the battlefield, this artifact deals 2 damage to that artifact's controller.

Whenever a Villain you control enters, each opponent loses 1 life and you gain 1 life. Put a plan counter on this enchantment.
When the fifth plan counter is put on this enchantment, sacrifice it. When you do, target opponent exiles the top five cards of their library. You may cast up to two spells from among the exiled cards without paying their mana costs.

, : Add .

Flying
Sphinx spells you cast cost less to cast.
Whenever Unesh or another Sphinx you control enters, reveal the top four cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

Other blue creatures you control get +1/+1.
: Target artifact creature becomes blue until end of turn.
Tap an untapped blue creature you control: Add . Spend this mana only to cast artifact spells or activate abilities of artifacts.

Changeling (This card is every creature type.)
: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

Target creature you control explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on the creature, then put the card back or put it into your graveyard.)
You may play an additional land this turn.

Flying, indestructible
Eternity Gate — Whenever this Vehicle attacks, mill three cards. For each creature card milled this way, create a 2/2 black Necron Warrior artifact creature token.
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.)

, : Put a charge counter on this artifact, then draw a card for each charge counter on it.

Trample
Whenever you cast a historic spell, Jamie McCrimmon gets +X/+X until end of turn, where X is that spell's mana value. (Artifacts, legendaries, and Sagas are historic.)
Doctor's companion (You can have two commanders if the other is the Doctor.)

Vigilance, lifelink (Attacking doesn't cause this creature to tap. Damage dealt by this creature also causes you to gain that much life.)
: Create a 4/4 white Angel creature token with flying. Activate only if you have at least 7 life more than your starting life total and only as a sorcery.

Offspring (You may pay an additional as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)
: Add one mana of any color.
: Put a +1/+1 counter on this creature.

Vigilance, trample
When this creature enters, if you cast it from your hand, create three Food tokens. (They're artifacts with ", , Sacrifice this token: You gain 3 life.")
Sacrifice three Foods: Return this card from your graveyard to the battlefield. Activate only during your turn.

Haste
Whenever Thraximundar attacks, defending player sacrifices a creature of their choice.
Whenever a player sacrifices a creature, you may put a +1/+1 counter on Thraximundar.

: Add .
, , Sacrifice a creature: Put a soul counter on this land. Then if there are three or more soul counters on it, remove those counters, transform it, then untap it. Activate only as a sorcery.