As long as it's your turn, Ultraviolet Maniac has lifelink.
{VP}{VP}{VP}: Until end of turn, whenever you gain life, each opponent loses that much life.

Uncharted Haven enters tapped.
As Uncharted Haven enters, choose a color.
{T}: Add one mana of the chosen color.

As long as Undeniable Groove has power 4 or greater, it must be blocked if able.

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. You may spend mana of any type to activate its abilities this turn.

Lifelink
Spells you cast and abilities you activate that target creatures you control cost {2} less. This effect can't reduce the mana in that cost to less than one mana.

At the beginning of your upkeep, create a 1/1 red Fan creature token. Then if you control two or more Fans, create another one of those tokens. Then if you control five or more Fans, Underground Sensation deals 2 damage to any target and you gain 2 life.
{3}{R}{W}: Create a 1/1 red Fan creature token.

Flying
Ward—Discard a card.
You have “Ward—Discard a card.”
At the beginning of your upkeep, your life total becomes equal to your devotion to black.

Indestructible
Equipped creature has indestructible as long as it's your turn.
Equip {1}
Spellcharge 5

Golems you control have trample.
Unflinching Titan can't attack or block unless you control three or more Golems.
Whenever Unflinching Titan enters or attacks, surveil 1. Then you may put a land card from your graveyard onto the battlefield tapped.
{3}, {T}: Create a 1/1 white Golem creature token.

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