, Exile Trustworthy Scout from your graveyard: Search your library for a card named Trustworthy Scout, reveal it, put it into your hand, then shuffle.

Target opponent chooses one —

• Truth — That player plays with their hand revealed for the rest of the game.

• Dare — Mill all but the bottom ten cards of that player's library. (To mill, put the top card of that library into its owner's graveyard.)

Flying

Whenever this creature deals combat damage to a player, you may destroy target artifact or enchantment that player controls.

Haste

When Tuktuk the Explorer dies, create Tuktuk the Returned, a legendary 5/5 colorless Goblin Golem artifact creature token.

Whenever you attack, choose odd or even. Creatures with mana value of that quality can't block this turn. (Zero is even.)

Each other colorless creature you control has bloodthirst 2. (If an opponent was dealt damage this turn, that creature enters with two additional +1/+1 counters on it.)

Sleight of Hand — : Draw two cards.

When Tyrant of Discord enters, target opponent chooses a permanent they control at random and sacrifices it. If a nonland permanent is sacrificed this way, repeat this process.

Flying

Sorcerous Elixir — Whenever Tzaangor Shaman deals combat damage to a player, copy the next instant or sorcery spell you cast this turn when you cast it. You may choose new targets for the copy.

Whenever this creature enters or transforms into Ulrich of the Krallenhorde, target creature gets +4/+4 until end of turn.

At the beginning of each upkeep, if no spells were cast last turn, transform Ulrich of the Krallenhorde.

: Regenerate Ulvenwald Primordials.

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Ulvenwald Primordials.

Companion — Each nonland card in your starting deck shares a card type. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)

As Umori, the Collector enters, choose a card type.

Spells you cast of the chosen type cost less to cast.

Creatures you control gain indestructible until end of turn.

Addendum — If you cast this spell during your main phase, put a +1/+1 counter on each of those creatures and they gain vigilance until end of turn.

As Unclaimed Territory enters, choose a creature type.

: Add .

: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.

, Discard a card: Return Undead Gladiator from your graveyard to your hand. Activate only during your upkeep.

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

, Sacrifice a creature: Target player reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard.

(: Add or .)

Underground Mortuary enters tapped.

When Underground Mortuary enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Underworld Cerberus can't be blocked except by three or more creatures.

Cards in graveyards can't be the targets of spells or abilities.

When Underworld Cerberus dies, exile it and each player returns all creature cards from their graveyard to their hand.

Constellation — Whenever Underworld Coinsmith or another enchantment you control enters, you gain 1 life.

, Pay 1 life: Each opponent loses 1 life.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

When Underworld Hermit enters, create a number of 1/1 green Squirrel creature tokens equal to your devotion to black. (Each in the mana costs of permanents you control counts toward your devotion to black.)

Whenever Underworld Sentinel attacks, exile target creature card from your graveyard.

When Underworld Sentinel dies, put all cards exiled with it onto the battlefield.

Menace (This creature can't be blocked except by two or more creatures.)

Whenever Unforgiving One attacks, return target creature card with mana value X or less from your graveyard to the battlefield, where X is the number of modified creatures you control. (Equipment, Auras you control, and counters are modifications.)

Whenever a player casts a spell, that player may pay . If the player does, they draw a card.

Choose a card name. Search target opponent's graveyard, hand, and library for up to four cards with that name and exile them. That player shuffles, then draws a card for each card exiled from their hand this way.

Enchant creature

When Unquestioned Authority enters, draw a card.

Enchanted creature has protection from creatures.

: Regenerate Unworthy Dead.

At the beginning of combat on your turn, put an oil counter on Urabrask's Forge, then create an X/1 red Phyrexian Horror creature token with trample and haste, where X is the number of oil counters on Urabrask's Forge. Sacrifice that token at the beginning of the next end step.

: Add .

: Target creature loses first strike or swampwalk until end of turn.

: Add , , or .

Target opponent sacrifices a creature of their choice for each creature put into your graveyard from the battlefield this turn.

, Sacrifice Urborg Mindsucker: Target opponent discards a card at random. Activate only as a sorcery.

Urborg Phantom can't block.

: Prevent all combat damage that would be dealt to and dealt by Urborg Phantom this turn.

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 .

Destroy target Spirit or enchantment.

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.

If a source would deal damage to you, prevent 1 of that damage.

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

Creature spells of the chosen type cost less to cast.

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 Stoneforge enters tapped.

: Add .

Roll two d6 and choose one result. Destroy each creature with power greater than or equal to that result. Then create a number of 2/2 white Knight creature tokens with vigilance equal to the other result.

When Valkyrie's Sword enters, you may pay . If you do, create a 4/4 white Angel Warrior creature token with flying and vigilance, then attach Valkyrie's Sword to it.

Equipped creature gets +2/+1.

Equip

Whenever a creature you control enters, creatures you control get +1/+1 until end of turn.

Enchant creature

Enchanted creature gets +1/+1.

When enchanted creature leaves the battlefield, create a 1/1 white Spirit creature token with flying.

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.

At the beginning of your upkeep, you lose 1 life unless an opponent has 10 or less life.

Sacrifice another creature: Regenerate Vampire Warlord. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)