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

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

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

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

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

Tempting Darkfiend enters with a flying counter on it unless an opponent pays 2 life. The same is true for menace, deathtouch, lifelink, and indestructible counters.

Deathtouch
{G}: Temptuous Crooner gains reach until end of turn.

Tenacious Snapvines enters with X +1/+1 counters and your choice of up to X different counters from among deathtouch, lifelink, vigilance, trample, menace, reach or ward {2} on it.
If damage would be dealt to Tenacious Snapvines, remove a +1/+1 counter and another kind of counter from it. If you do, prevent that damage.

At the beginning of your end step, you may pay {2}. If you do, you gain 2 life, then target opponent may pay {2}. If they don't, you draw a card.

Tenuous Edge enters tapped.
{T}: Add {U} or {R}.
{T}, Discard another card named Tenuous Edge: Draw a card.

As long as you've cast an instant spell this turn, Teqien Overseer gets +1/+1 and has hexproof.
As long as you've cast a sorcery spell this turn, Teqien Overseer gets +1/+1 and has flying.

Draw a card. When you do, pay for and choose any number.
+{U} — Return target spell you don't control to its owner's hand. That player draws a card.
+{R} — Target player discards all the cards in their hand, then draws that many cards.
+{G} — Target player may put a land card from their hand or graveyard onto the battlefield.

This spell can't be countered.
Terminal Impact deals damage to any target equal to the amount of mana spent to cast it. If at least seven mana was spent to cast it, you may have it deal that much damage to each creature and each player instead.

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

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

Menace
At the beginning of combat on your turn, if you've spent at least five mana to cast spells this turn, put two +1/+1 counters on Terror of Whitecliff Pass.

Test Subject Alpha enters with a +1/+1 counter and a trample counter on it.
At the beginning of your upkeep, you may move a counter from Test Subject Alpha onto another creature.

{T}: Add {C}.
Spellcharge 4

Target creature gains hexproof until end of turn. Untap it.
Draw a card if your devotion to blue is three or greater.

Flash
Whenever Thassa's Tideshaper attacks, defending player mills two cards and you draw a card. Then discard a card unless defending player has eight or more cards in their graveyard.

Defender, trample
At the beginning of combat on your turn, if you have at least 3 life more than than your starting life total, Thawing Yeti loses defender until end of turn. Otherwise, you gain 2 life.

[+2]: Each player puts their hand on the bottom of their library in a random order. You draw five cards, then each opponent draws two cards.
[+1]: Untap each land you control.
[–3]: Return up to three target nonland permanents to their owner's hands.
[–9]: You get an emblem with “Whenever an opponent casts their first spell each turn, gain control of it. You may choose new targets for that spell.”

Flying, vigilance
When The Army of Trax enters, 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.

Lifelink
Indulgence
Whenever you indulge, you may gain control of target nonland permanent for as long as you control The Beauclaire Family.

Whenever you cast a noncreature spell, creatures you control get +1/+1 and gain haste until end of turn.