msem-instigator

Tomb of the Roseblade enters the battlefield tapped.
{T}: Add {C}.
{X}, {T}, Sacrifice Tomb of the Roseblade: Search your library for an Equipment card with mana value X or less, put it onto the battlefield, then shuffle. Activate only as a sorcery.

Equipped creature has “Whenever this creature attacks, you may sacrifice Torch of Phoenixfire. When you do, Torch of Phoenixfire deals 3 damage to any target.”
Equip {1}

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Crew 1 (Tap any number of creatures you control with total power 1 or greater: This Vehicle becomes an artifact creature until end of turn.)

({T}: Add {U} or {R}.)
Torrid Geysers enters the battlefield tapped unless you control two or more basic lands.

{T}: Add {C}.
{2}, {T}: Draw a card. Activate only if you have no cards in hand.

Towering Boughs enters the battlefield tapped.
{T}: Add {R} or {G}.
{3}{R}{G}: Until end of turn, Towering Boughs becomes a 6/6 red and green Treefolk creature with with trample and “Whenever this creature attacks or blocks, torment yourself.” It's still a land. (To torment yourself, lose 3 life unless you discard a card or sacrifice a nonland permanent.)

Gestalt (When this or another creature enters under your control, you may merge it with the one in play, keeping counters and attachments. They become the permanent on top plus all abilities from under it.)
Towering Wickerman can't be blocked by creatures with power 2 or less.
Whenever a creature merges with Towering Wickerman, put two +1/+1 counters on it.

Toxic Jungle enters the battlefield tapped unless you have 15 or less life.
{T}: Add {B} or {G}.

As Toxic Spring enters the battlefield, you may tap an untapped creature you control. If you don't, Toxic Spring enters the battlefield tapped.
{T}: Add {U} or {B}.

Equipped creature gets +0/+2.
When equipped creature dies, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Equip {1}

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.

({T}: Add {W} or {U}.)
Tranquil Stream enters the battlefield tapped.

You may exile a land card from your hand rather than pay this spell's mana cost.

{T}: Add {C}.
{7}: Transplanted Citadel becomes a 6/6 Golem artifact creature until end of turn. It's still a land. This ability costs {1} less to activate for each artifact you control.

You may reveal creature cards with mana value 3 or less as you draw them. Once each turn, when you reveal a card this way, you may aetherize it. (To aetherize, create a token that's a copy of it, then exile that token.)

Whenever a creature attacks you or a planeswalker you control, that creature doesn't untap during its controller's next untap step.

At the beginning of your upkeep, you may exile a card from your hand. If you do, draw a card.
Whenever equipped creature deals combat damage to a player, you may put a card exiled with Travel Pouch into its owner's hand.
Equip {1}

{1}, Sacrifice Traveler's Amulet: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Treacherous Den enters the battlefield tapped.
{T}: Add {B} or {R}.
{2}{B}{R}, {T}, Sacrifice Treacherous Den: Draw a card.

Treacherous Oasis enters the battlefield tapped.
{T}: Add {U} or {B}.
{2}{U}{B}: Until end of turn, Treacherous Oasis becomes a Crocodile creature in addition to its other types. It can't be blocked this turn.
Scavenge {1}{U}{B}

{T}: Add {C}.
{3}, {T}, Sacrifice Treasure Beach: Create three Treasure tokens. (They have “{T}, Sacrifice this artifact: Add one mana of any color.”)

Whenever Treasure Hauler attacks, draw a card.
Crew 3 (Tap any number of creatures you control with total power 3 or greater: This Vehicle becomes an artifact creature until end of turn.)

Untap all other artifacts you control during each other player's untap step.
{T}: Untap another target permanent.

As Tree of Timelines enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.
{T}: Add {B}, {G}, or {U}.