msem-instigator

Players skip their untap steps during extra turns.

Temporary Armory enters the battlefield with four +1/+1 counters on it.
Whenever Temporary Armory becomes equipped to a creature, move a +1/+1 counter from Temporary Armory to that creature.
Equipped creature has first strike.
Equip {2}

Tempting Realms enters the battlefield tapped unless you control two or more other lands.
{T}: Add {B}.
{T}, Pay 1 life: Add {U} or {R}.

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
Tenacious Brawler enters the battlefield with X +1/+1 counters on it.

This spell can't be countered.
{R/G}: Target spell can't be countered.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)
Create a tapped colorless Mountain Forest land token. (It has “{T}: Add {R} or {G}.”)

Discard a card: Tender Warden gets +2/+2 until end of turn. Activate only during your turn.

{T}: Put a +1/+1 counter on Tender of Gardens. Activate only as a sorcery.

When Tender of the Land enters the battlefield, if you control four or more lands, draw a card.

{T}, Pay 1 life: Add {R} or {W}.
{2}, {T}, Sacrifice Tenement Alley and another permanent: Draw a card. Activate only during your turn.

Look at the top eight cards of your library. You may reveal up to one Elf and up to one Dwarf card from among them. Put the revealed cards into your hand and the rest on the bottom of your library in a random order. Tenuous Alliance deals 2 damage to you.

Terra Novea's power and toughness are each equal to the number of permanents you control.
{T}: Add {G} for each land you control.

This spell costs {1} less to cast for each creature you control that's in a pack. (Two or more creatures you control with equal power are in a pack.)

{T}: Add one mana of any color.
{X}: Terracotta Idol becomes a Spirit artifact creature with base power and toughness X/X until end of turn. Activate only as a sorcery.

You may have Terracotta Legion enter the battlefield as a copy of any creature with mana value 1 or less you control, except it's an artifact in addition to its other types.

{T}: Add one mana of any color. Spend this mana only to cast a creature spell or activate an ability of a creature.
Whenever a creature you control becomes a Demigod or God, untap Terracotta Sage and it becomes a 4/4 Dragon with flying until end of turn.

Wu Xing (Add effects based on the number of colors of mana spent to cast this spell.)
1 | Search your library for up to two land cards, put them onto the battlefield tapped, then shuffle.
5 | Create an X/X blue Spirit creature token, where X is the number of differently named lands you control.

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

Target creature you control gets +X/+X until end of turn, where X is the number of lands you control.

Vigilance
When Territorial Camaar enters the battlefield, you may sacrifice a land. If you do, search your library for a Desert card, put it onto the battlefield tapped, then shuffle.

Flying, first strike
Whenever Terror of Sunset Cliffs attacks, each player discards their hand and draws seven cards.
Whenever an opponent discards a card, Terror of Sunset Cliffs deals 1 damage to that player.

First strike
Tesqua Cohort enters the battlefield with a +1/+1 counter on it if you control another creature with a +1/+1 counter on it.

When Tessellated Orb enters the battlefield, you may search your library for a basic land card, reveal it, and put it into your hand. If you do, shuffle your library.
When Tessellated Orb dies, draw a card.

Puzzlebox (Begin the game with this and another card you own from outside the game in the command zone, locked. That card is face down until you unlock this.)
{0}: Unlock Tesseract Conjecture. If the revealed card shares a mana value with three or more permanents you control, cast it without paying its mana cost.

Create an X/X green Mutant creature token.
Draw a card.