Temple of Mystery enters the battlefield tapped.
When Temple of Mystery enters the battlefield, scry 1.
{T}: Add {G} or {U}.

Temple of Plenty enters the battlefield tapped.
When Temple of Plenty enters the battlefield, scry 1.
{T}: Add {G} or {W}.

Temple of Silence enters the battlefield tapped.
When Temple of Silence enters the battlefield, scry 1.
{T}: Add {W} or {B}.

Temple of Triumph enters the battlefield tapped.
When Temple of Triumph enters the battlefield, scry 1.
{T}: Add {R} or {W}.

Flash
When Tempo Arbiter enters the battlefield, up to one target creature gets -X/-0 until end of turn, where X is the number of artifacts you control.

Enchant creature
When Tempting Song enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Enchanted creature has “{4}: Untap this creature.”

When Terror of Olantin enters the battlefield, create a number of 1/1 blue Tentacle creature tokens equal to your devotion to green.

Flying, vigilance
When The Army of Trax enters the battlefield, create a number of 0/0 white Army creature tokens equal to your devotion to white. Then put that many +1/+1 counters on each Army you control.

When The Love of a Lifetime enters the battlefield, you may search your library for a legendary creature card that doesn't share a name with a creature you control, reveal it, put it into your hand, then shuffle.
Creatures you control get +1/+1.

When The Smoking Strand enters the battlefield, you may search your library for a planeswalker card, reveal it, put it into your hand, then shuffle.
Planeswalkers you control have “+1: Draw a card.”

When The Whisper of Eltensia enters the battlefield, if you cast it from your hand and a permanent you controlled left the battlefield this turn, add {R}{R}{R}.
{2}{R}{R}: You may put a creature card from your hand onto the battlefield. That creature gains haste and “At the beginning of the end step, sacrifice this creature.”

When Thornlasher Mortis enters the battlefield, mill two cards.
Whenever one or more cards leave your graveyard, create a 1/1 green Saproling creature token. This ability triggers only once each turn.

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

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

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

Ward {1}
When Transfixing Troupe enters the battlefield, exile target creature an opponent controls until Transfixing Troupe leaves the battlefield.

Lifelink
When Traxian General enters the battlefield, create a 0/0 white Army creature token. Put a +1/+1 counter on each Army you control.

When Truffletusk enters the battlefield, create a Food token.
Whenever you sacrifice a Food, you may create a 1/1 white Soldier creature token with vigilance.

Multitude {5}{B}{G}
Trample
When Tugae Corpsemaker enters the battlefield, each opponent sacrifices a creature.

Multitude {5}{G}{G}
When Tugae Rallier enters the battlefield, create a 1/1 green Elf creature token. If you control five or more creatures, you may instead put a +1/+1 counter on each creature you control.

When Unknowable Starspawn enters the battlefield, target opponent chooses two —
• You gain 4 life and that opponent loses 4 life.
• That opponent sacrifices a creature.
• That opponent discards a card.

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

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

Lifelink
When Vibeseeker enters the battlefield, scry 1.

When Vibrant Vengeance enters the battlefield, all creatures get -2/-2 until of turn.
Whenever you tap a land for mana, add one mana of any type that land produced.