msem-instigator

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Trained Warhawk enters the battlefield, create a 1/1 white Soldier creature token.

Each creature you control enters the battlefield with an additional +1/+1 counter on it.
When Training Sim enters the battlefield, create a Function token with “Target creature you control fights target creature you don't control.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Tranquil Cove enters the battlefield tapped.
When Tranquil Cove enters the battlefield, you gain 1 life.
{T}: Add {W} or {U}.

Tranquil Shrine enters the battlefield tapped.
When Tranquil Shrine enters the battlefield, if you don't control a legendary creature, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.

When Transcended Explorer enters the battlefield, if you control another enchantment, draw a card.

Enchant creature
When Transcendent Arts enters the battlefield, draw a card.
Enchanted creature can't be blocked by creatures that don't share a creature type with it.

Wanderlust — When Transnaturalist enters the battlefield, if you control four or more differently named lands, you may return target creature to its owner's hand.

When Trapped in the Tower enters the battlefield, exile target creature an opponent controls until Trapped in the Tower leaves the battlefield. (That creature returns under its owner's control.)
When you lose life, sacrifice Trapped in the Tower.

Vigilance
When Traveling Duo enters the battlefield, create a 1/1 colorless Servo artifact creature token.

When Traversing Bulkvine enters the battlefield, search your library for three land cards with different names and reveal them. An opponent chooses one of them. Put that card into your graveyard and the rest into your hand, then shuffle.

When Traversing the Hellwastes enters the battlefield, create a 1/1 green Scout creature token. It gains haste until end of turn.
Whenever a creature enters the battlefield under your control, you may pay 2 life. If you do, draw a card.

Trial 4 (As you cast this spell, an opponent of your choice may pay 4 life. If they don't, they fail the trial.)
When Treacherous Devil enters the battlefield, if an opponent passed the trial, that player gains control of Treacherous Devil.

When Treacherous Warden enters the battlefield, search your library for a card, put into your graveyard, then shuffle.
Whenever a creature enters the battlefield from your graveyard, each opponent loses 2 life and you gain 2 life.

Haste
When Treasure Haulers enters the battlefield, you may salvage an artifact card. (Exile one from your graveyard until this creature leaves the battlefield. Whenever this creature deals combat damage to a player, put a card it salvaged into your hand.)

When Treasure Hoard enters the battlefield, create a 2/2 blue Rogue creature token.
{2}{R}, Tap an untapped creature you control, Sacrifice Treasure Hoard: Create two Treasure tokens. (They're artifacts with “{T}, Sacrifice this artifact: Add one mana of any color.”)

When Trench Breaker enters the battlefield, put target creature on top of its owner's library.

When Trenchbottom Mariners enters the battlefield, you lose 3 life, mill three cards, and create a Treasure token.
Whenever Trenchbottom Mariners attacks, you may cast a permanent card from your graveyard by sacrificing another artifact in addition to paying its costs.

When Trident of Benediction enters the battlefield, create two 1/1 white Merfolk creature tokens.
Equipped creature has vigilance and “Whenever this creature attacks or blocks, creatures you control get +1/+1 until end of turn.”
Equip {2}

Flying
When Trove Tyrant enters the battlefield, exile the top five cards of your library.
Whenever Trove Tyrant deals combat damage to a player, you may cast an artifact card exiled with it without paying its mana cost.

When Truffle Snuffer enters the battlefield, mill three cards. When you do, choose one —
• Return an instant or sorcery card put into your graveyard this way to your hand.
• Put two +1/+1 counters on Truffle Snuffer.

Harmony — Search your library for a basic land or Desert card, reveal it, and put it into your hand. Then shuffle.
When Trumpeting Pathmaker enters the battlefield, harmonize. (Trigger up to one harmony of a permanent you control.)

When Truthseeker's Blade enters the battlefield, it deals 2 damage to target creature you don't control.
Equipped creature gets +2/+0.
Equip {3}

Flash
When Tsang Jin, Master of the Jade Sea enters the battlefield, put target land card from a graveyard onto the battlefield under your control.

Tsubasa's Redoubt enters the battlefield tapped.
When Tsubasa's Redoubt enters the battlefield, you may mill two cards.
{T}: Add {W} or {B}.

Flash
Flying
When Turela, Defiant Angel enters the battlefield, exile all other creatures you control. Return them to the battlefield under their owner's control at the beginning of the next end step.