{T}: Add one mana of any color. Put a tide counter on Tidelock Pearl.
{1}{U}, {T}, Sacrifice Tidelock Pearl: Search your library for a Kraken, Leviathan, Octopus, or Serpent card with mana value less than or equal to the number of tide counters on Tidelock Pearl, put it onto the battlefield, then shuffle.

{T}: Add {C}.
{4}, {T}, Sacrifice Timeworn Crags: Destroy target nonbasic land. This ability costs {1} less to activate for each nonbasic land you don't control.

Spellcharge 2

Tiril District enters tapped unless you control a Plains, an Island, and a Swamp.
{T}: Add {W}, {U}, or {B}.

Titan's Stairs enters tapped.
{T}: Add {R} or {W}.
{3}{R/W}: Titan's Stairs becomes a 2/2 red and white Archon creature with flying until end of turn. It's still a land. This ability costs {X} less to activated, where X is your devotion to red and white. Activate only once each turn.

Spend only mana of different colors to cast this spell.
For each color among permanents you control, the first multicolored spell you cast each turn costs one mana of that color less to cast. This effect reduces only the amount of colored mana you pay.

When Totemic Guidestones enters, draw a card.
Creature spells you cast cost {1} less to cast.
You may cast creature spells as though they had flash.

Deathtouch
{T}: Add {C}.
Spellcharge 3

{1}, Remove a +1/+1 counter from Traveler of Dawn: Exile target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.

{1}, Sacrifice Traveler's Amulet: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Tree of Clues enters tapped.
{T}: Add {B}, {R}, or {G}.
{VP}{VP}{VP}{VP}, Discard Tree of Clues: Target creature gets +3/+3 and gains flying until end of turn.

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

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

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

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

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

Spellcharge 2
When Vanquished Conqueror dies, draw a card.

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.

Vault of Poisons enters with a dose counter on it.
Whenever a Noble you control enters, put a dose counter on Vault of Poisons.
{4}, {T}: Each opponent loses X life and you gain X life, where X is the number of dose counters on Vault of Poisons.

Vigorous Soundvein enters tapped.
When Vigorous Soundvein enters, you may pay 1 life. If you do, add one mana of any color other than green.
{T}: Add {G}.

Vishanki District enters tapped unless you control a Swamp, a Mountain, and a Forest.
{T}: Add {B}, {R}, or {G}.

{2}, {T}: Scry 1.

Vigilance
{T}: Scry 1.
Spellcharge 5

{T}, Sacrifice Warpway Rings: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.