When this creature enters, look at the top four cards of your library. You may reveal a land card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. If you didn't put a card into your hand this way, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)
Flying
Noncreature spells you cast have improvise.

When this creature enters, create a 2/2 white Knight creature token with vigilance, a 3/3 green Centaur creature token, and a 4/4 green Rhino creature token with trample.

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Flying

As this artifact enters, choose an opponent and a card name other than a basic land card name.
The chosen player reveals each card they draw.
When the chosen player draws a card with the chosen name, sacrifice this artifact. If you do, this artifact deals 10 damage to that player.

As an additional cost to cast this spell, discard a card.
Draw two cards and create two Treasure tokens. (They're artifacts with ", Sacrifice this token: Add one mana of any color.")

Deathtouch
Ferocious — Whenever this creature attacks while you control a creature with power 4 or greater, you gain 2 life.

Put a +1/+1 counter on target creature. That creature gains reach until end of turn. (It can block creatures with flying.)

Flying
Whenever this creature deals combat damage to a player, you may sacrifice it. If you do, draw three cards.

Trample
Whenever this Vehicle attacks or blocks, it gets +1/+1 until end of turn for each Spider you control.
Crew 2

Blindblast deals 1 damage to target creature. That creature can't block this turn.
Draw a card.

Create a 1/1 colorless Expansion-Symbol creature token for each different expansion symbol among permanents you control.

Ward—Discard a card.
Whenever a creature an opponent controls enters, Gideon deals 1 damage to that player.
Whenever an opponent activates a loyalty ability, Gideon deals 1 damage to that player.

Return target nonland permanent to its owner's hand.

At the beginning of your end step, if you control a creature with power 4 or greater, exile the top card of your library. You may play that card until you exile another card with this enchantment.

As long as Grist isn't on the battlefield, it's a 1/1 Insect creature in addition to its other types.
+1: Create a 1/1 black and green Insect creature token, then mill a card. If an Insect card was milled this way, put a loyalty counter on Grist and repeat this process.
−2: You may sacrifice a creature. When you do, destroy target creature or planeswalker.
−5: Each opponent loses life equal to the number of creature cards in your graveyard.

All Sliver creatures have menace. (They can't be blocked except by two or more creatures.)

When this creature enters, venture into the dungeon. (Enter the first room or advance to the next room.)
Displacement — : Return this creature to its owner's hand.

Defender (This creature can't attack.)
Reach (This creature can block creatures with flying.)