Search your library for a card, put it into your hand, then shuffle.
Flashback—{1}{B}, Discard a card, Sacrifice a creature.

Whenever you cast a colorless spell, you may pay {C}. If you do, copy it. You may choose new targets for the copy.
Whenever a creature you control attacks, put a +1/+1 counter on it for each other creature you control with the same name as that creature.

Whenever another creature dies, you may integrate it.
Whenever a creature card is integrated onto Unmolded One, you may have it become a copy of that card until end of turn, except it has Unmolded One's abilities.

Once each turn, when you activate a nonmana ability, you may have creatures your opponents control get -1/-0 until end of turn.
{2}: Unnerving Moth gains flying until end of turn.

Untap any number of target creatures. They gain flying and protection from noncreatures until end of turn.

Golems you control have ward {1}.
Unspeaking Titan can't attack or block unless you control three or more Golems.
Whenever Unspeaking Titan enters or attacks, tap up to one target creature and put a stun counter on it.
{3}, {T}: Create a 1/1 white Golem creature token.

Unstable Formation enters with three charge counters on it.
{1}, {T}, Remove a charge counter from Unstable Formation: Unstable Formation deals 1 damage to target player or planeswalker. You may sacrifice Unstable Formation. If you do, draw a card.

{T}: Add {C}.
Whenever Unwavering Gates attacks, other creatures you control gain indestructible until end of turn.
Spellcharge 5

Golems you control have deathtouch.
Unyielding Titan can't attack or block unless you control three or more Golems.
Whenever Unyielding Titan enters or attacks, target opponent reveals their hand. Exile a card from their hand or graveyard.
{3}, {T}: Create a 1/1 white Golem creature token.

Approval — {3}, {T}, Discard a card: Draw a card. This ability costs {X} less to activate, where X is the number of colors among permanents you control.

Choose up to four target permanents. If you control a creature, destroy a creature chosen this way. Repeat this process for artifacts, enchantments, and planeswalkers.

When Urban Explorer enters, return a permanent card with mana value 1 or less from your graveyard to your hand.
Landfall — Whenever a land you control enters, Urban Explorer gets +2/+1 until end of turn.

Urban Sunscape enters tapped.
{T}: Add {R} or {W}.
{4}: Make a pledge. Activate only as a sorcery.

Double strike
Whenever Urban Twinmotors deals combat damage to a player, untap up to one target permanent.

When Ursine Advocate enters, create a 2/2 green Bear creature token.

Whenever you gain control of a permanent you don't own or a permanent you don't own enters under your control, put a +1/+1 counter on Vagrant Sorceress.

Distribute three +1/+1 counters among up to three target creatures.

Valley Caravan's power and toughness are each equal to the number of creatures you control.
Wander {3}{W}{W}
When Valley Caravan enters, if it wandered, create a 1/1 white Human creature token.

Valley Village enters tapped.
{T}: Add {R} or {G}.
{1}, Discard Valley Village: Scry 2.

Menace
Solidarity

Spellcharge 2
When Vanquished Conqueror dies, draw a card.

Equipped creature gets +2/+2.
Equip {2}
Spellcharge 4

Deathtouch
{1}{VP}{VP}: Variegated Shade gets +2/+2 until end of turn.

[+2]: Create a colorless artifact token named Potion with “Sacrifice this artifact: Put two +1/+1 counters on target creature. Activate only as a sorcery.”
[–3]: You gain 8 life.
[0]: Remove all loyalty counters from Vasilisa, Helping Hand, then transform her.

As this permanent transforms into Vasilisa, Waging War, it becomes your choice of a 7/7 Hydra with trample, a 6/5 Kraken with hexproof, or a 5/6 Spider with vigilance, reach, and deathtouch.