msem-instigator

Kicker {X}{U} (You may pay an additional {X}{U} as you cast this spell.)
When Tidetwister Mage enters, if it was kicked, return all other creatures with power X or less to their owners' hands.

Flying, prowess
Whenever you cast a noncreature spell, reveal the bottom two cards of your library. Target opponent chooses one of them. Put that card on the bottom of your library and the rest into your hand.

Take an extra turn after this one. Exile Time if it wasn't fused.
Fuse (You may cast one or both halves of this card from your hand.)

Instant and sorcery spells you control have leitmotif. (Exile that spell as it resolves if you cast it from your hand. When you next cast a spell that shares a color with that card, you may cast it from exile without paying its mana cost.)

Put target nonland permanent into its owner's library second from the top.

Return target permanent to its owner's hand. If this spell wasn't cast from your hand, put that permanent on top of its owner's library instead.
Coalesce {9}{U} (You may cast this from your graveyard for {9}{U}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)

Choose target permanent. Take an extra turn after this one. During that turn's untap step, permanents other than the chosen permanent phase out until end of turn. Exile Time Stands Still.

Exile target creature, then return that card to the battlefield under its owners' control.

Counter target spell unless its controller pays {2}.

This spell costs {2} less to cast if you've cast another spell this turn.
Enchant creature
When Tire Out enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

When Titan of Lake Vasil enters, untap up to four target permanents.
{3}{U}: Draw a card.

Colossal 2—{6}{U} (You may cast this for its colossal cost to have it enter with two +1/+1 counters; or pay {6}{U} as a sorcery: Put two +1/+1 counters on it if it has none.)
When Titanic Fathomclaw's colossal ability puts one or more counters on it, return target instant or sorcery card from your graveyard to your hand.

When Titou Louoe, Bayou Shaman enters, create a blue Aura Curse enchantment token named Curse of Impotence attached to target player. The token has enchant player and “Creatures enchanted player controls get -1/-0.”

Tizzanier Tidehunter can't be blocked as long as you control another Merfolk.

When To Go Beyond enters, draw a card, then choose a card name.
{2}{U}: Reveal a card you own from outside the game with the chosen name and put it on top of your library.

Return target permanent you control to its owner's hand. (Then exile this card. You may cast the creature later from exile.)

You may tap or untap target nonland permanent.
Catalyze. (The next spell you cast this turn costs {1} less to cast.)

Tomb of Great Drakes enters tapped.
{T}: Add {U}.
{2/U}{2/U}: Tomb of Great Drakes becomes a 2/2 blue Elemental creature with flying until end of turn. It's still a land.

Whenever a creature you control attacks, you may sacrifice a Treasure. If you do, that creature can't be blocked this turn.

When Tombstone Looter enters, you may draw a card. If you do, discard a card.
Unearth {1}{U} ({1}{U}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the end step or if it would leave the battlefield. Unearth only as a sorcery.)

Ward {2}
Even numbered spells you cast each turn costs {2} less to cast. (The second, fourth, sixth, etc.)

Exile up to X target instant and/or sorcery cards with total mana value X or less from your graveyard. You may cast a copy of each card exiled this way without paying its mana cost. Exile Total Recall.

Target creature can't be blocked this turn. Scry 1.
Fabled {2}{U} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

Enchant creature
Enchanted creature has hexproof.
{U}: Enchanted creature can't be blocked by target creature this turn.

Tap target creature, then draw X cards, where X is its mana value.