Whenever Urborg Scavengers enters or attacks, exile target card from a graveyard. Put a +1/+1 counter on Urborg Scavengers.

Urborg Scavengers has flying as long as a card exiled with it has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Kicker (You may pay an additional as you cast this spell.)

: Regenerate Urborg Skeleton.

If Urborg Skeleton was kicked, it enters with a +1/+1 counter on it.

, , Discard a card: Each other player loses 2 life. You gain life equal to the life lost this way.

Urborg Volcano enters tapped.

: Add or .

First strike

Creatures with swampwalk can be blocked as though they didn't have swampwalk.

Destroy target Spirit or enchantment.

: Add .

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Uril, the Miststalker gets +2/+2 for each Aura attached to it.

When Uro enters, sacrifice it unless it escaped.

Whenever Uro enters or attacks, you gain 3 life and draw a card, then you may put a land card from your hand onto the battlefield.

Escape—, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

: Ursine Champion gets +3/+3 and becomes a Bear Berserker until end of turn. Activate only once each turn.

Trample

At the beginning of combat on your turn, mill a card and choose an opponent at random. Ursine Monstrosity attacks that player this combat if able. Until end of turn, Ursine Monstrosity gains indestructible and gets +1/+1 for each card type among cards in your graveyard.

When Uruk-hai Berserker enters, the Ring tempts you.

+1: Head to AskUrza.com and click +1.

-1: Head to AskUrza.com and click -1.

-6: Head to AskUrza.com and click -6.

When Urza, Lord High Artificer enters, create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control."

Tap an untapped artifact you control: Add .

: Shuffle your library, then exile the top card. Until end of turn, you may play that card without paying its mana cost.

You may activate the loyalty abilities of Urza, Planeswalker twice each turn rather than only once.

+2: Artifact, instant, and sorcery spells you cast this turn cost less to cast. You gain 2 life.

+1: Draw two cards, then discard a card.

0: Create two 1/1 colorless Soldier artifact creature tokens.

−3: Exile target nonland permanent.

−10: Artifacts and planeswalkers you control gain indestructible until end of turn. Destroy all nonland permanents.

Artifact creatures you control get +2/+2.

: Create a token that's a copy of target artifact you control, except it's a 1/1 Soldier creature in addition to its other types.

: Urza's Avenger gets -1/-1 and gains your choice of banding, flying, first strike, or trample until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

: Draw a card.

Whenever a player casts an artifact spell, you may pay . If you do, you gain 1 life.

Urza's Contact Lenses enters tapped.

Urza's Contact Lenses doesn't untap during your untap step.

As long as Urza's Contact Lenses is untapped, all players play with their hands revealed.

Clap your hands twice: You may tap or untap Urza's Contact Lenses.

Trample

: Urza's Engine gains banding until end of turn. (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

: Attacking creatures banded with Urza's Engine gain trample until end of turn.

Multicolored spells cost less to cast.

Each player draws two cards, then discards three cards, then loses 4 life.

As Urza's Incubator enters, choose a creature type.

Creature spells of the chosen type cost less to cast.

Whenever an artifact you control is put into a graveyard from the battlefield, if it wasn't sacrificed, you may pay . If you do, draw a card.

Kicker (You may pay an additional as you cast this spell.)

This spell can't be countered.

Urza's Rage deals 3 damage to any target. If this spell was kicked, instead it deals 10 damage to that permanent or player and the damage can't be prevented.

(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.)

Exile all nonland permanents that aren't legendary.

: Roll a six-sided die. Urza's Science Fair Project gets the indicated result.

1 — It gets -2/-2 until end of turn.

2 — Prevent all combat damage it would deal this turn.

3 — It gains vigilance until end of turn.

4 — It gains first strike until end of turn.

5 — It gains flying until end of turn.

6 — It gets +2/+2 until end of turn.

, : Draw a card. Then discard a card unless you exile a historic card from your graveyard. (Artifacts, legendaries, and Sagas are historic.)

: Add .

Metalcraft — : Add for each Urza's land you control. Activate only if you control three or more artifacts.

Return target permanent you control to its owner's hand. (Then exile this card. You may cast the creature later from exile.)

When Uthgardt Fury enters the battlefield, it deals 4 damage to any target.

Damage isn't removed from creatures your opponents control during cleanup steps.

At the beginning of your upkeep, put a spore counter on Utopia Mycon.

Remove three spore counters from Utopia Mycon: Create a 1/1 green Saproling creature token.

Sacrifice a Saproling: Add one mana of any color.

: Add one mana of any color.

Exile target nonland permanent.

Flying

Whenever a Dragon you control attacks, create a 6/6 red Dragon creature token with flying.

Uurg, Spawn of Turg's power is equal to the number of land cards in your graveyard.

At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

, Sacrifice a land: You gain 2 life.

Flying

, Return two lands you control to their owner's hand: Copy target instant or sorcery spell. You may choose new targets for the copy.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flying, first strike

Whenever this creature mutates, you may cast target noncreature card with mana value 3 or less from your graveyard without paying its mana cost.

Landfall — Whenever a land you control enters, exile the top card of your library. You may play that card for as long as it remains exiled.

At the beginning of your end step, if there are cards exiled with Valakut Exploration, put them into their owner's graveyard, then Valakut Exploration deals that much damage to each opponent.

: Valakut Invoker deals 3 damage to any target.

Valakut Stoneforge enters tapped.

: Add .

At the beginning of combat on your turn, for each Aura and Equipment attached to Valduk, Keeper of the Flame, create a 3/1 red Elemental creature token with trample and haste. Exile those tokens at the beginning of the next end step.

Flying

Ward—Pay 2 life.

Whenever an opponent loses life for the first time during each of their turns, put a +1/+1 counter on Valgavoth, Harrower of Souls and draw a card.

Manifest dread X times, then put X +1/+1 counters on each of those creatures. (To manifest dread, look at the top two cards of your library, then put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.)

Whenever you cycle another card for the first time each turn, create a 1/1 white Human Soldier creature token.

Cycling (, Discard this card: Draw a card.)

White creatures get +2/+0 until end of turn.

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

When Valorous Steed enters, create a 2/2 white Knight creature token with vigilance.

Skulk (This creature can't be blocked by creatures with greater power.)

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Play with the top card of your library revealed.

As long as the top card of your library is black, Vampire Nocturnus and other Vampire creatures you control get +2/+1 and have flying.