At the beginning of combat on your turn, Thrill of the Trendchase becomes a copy of a creature on the battlefield chosen at random until end of turn, except it's a 5/5 red Elemental with flying and haste and isn't legendary if the chosen creature is legendary.

Whenever a creature or land you control enters, you gain 1 life.
Creatures you control get +1/+1 as long as you have at least 3 life more than your starting life total.

Enchant creature
As long as enchanted creature has flying, each creature you control has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Vigilance, reach
When Thundering Serpent enters, you gain 6 life.

Whenever you cast a creature spell, put X depth counters on Tide's Ire, where X is that spell's mana value.
Remove ten depth counters from Tide's Ire: Create an 8/8 blue Kraken creature token.
Remove thirty depth counters from Tide's Ire: Create Tromokratis, a legendary 20/20 blue Kraken creature token with trample and hexproof.

{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.

Tidewake Walker enters with a hexproof counter on it.

Flying
Ward—{2}, Pay 2 life.
Whenever you cast a noncreature spell, draw a card.

{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

When Tireless Aspirants enters, you may draw a card. If you do, discard a card.
Wander {1}{U}

When Tiril Ambassador enters, you may return target nonland card from your graveyard to your hand. You lose life equal to its mana value.
Basic landcycling {1}{U}

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

Ward {2}
Whenever an enchantment you control enters, put a +1/+1 counter on Tiro, the Silent Blade.

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 activate, where X is your devotion to red and white. Activate only once each turn.

Equipped creature gets +2/+0 and has protection from permanents and spells with greater mana value than itself. This effect doesn't remove Titansbane.
Equip {2}{W}

At the beginning of each player's upkeep, that player discards a card or sacrifices a nontoken, nonland permanent. If Tithe to the Machine was sacrificed this way, create a 2/2 black Zombie artifact creature token for each card type among cards integrated onto it. Otherwise, integrate that card.

When Together in Arms enters, create two 1/1 colorless Soldier creature tokens.
You controlled a spell that targeted a creature you controlled this turn.
You controlled an ability that targeted a creature you controlled this 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.

As Top of the Charts enters, choose a mana value.
Creatures with the chosen mana value get +1/+1. All other creatures get -1/-1.

First strike
Whenever Tormenting Lightrider attacks, if defending player has 10 or less life, Tormenting Lightrider gains double strike until end of turn.
At the beginning of your end step, if a creature died this turn, each opponent loses 3 life unless they discard a card or sacrifice a nonland permanent.

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.

Flash
Enchant creature
Enchanted creature gets +2/+5.

{1}, {T}: Add one mana of any color.
{T}: Add one mana of any color. You can't spend this mana to cast spells from your hand.

When Towering Sentinel enters, for each kind of counter among permanents you control, put a counter of that kind on Towering Sentinel, then add {G} or {U}.