Counter target spell.
Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle your library.)

Target player mills half their library, rounded down.

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

Enchant creature
As Traveler's Cloak enters the battlefield, choose a land type.
When Traveler's Cloak enters the battlefield, draw a card.
Enchanted creature has landwalk of the chosen type. (It can't be blocked as long as defending player controls a land of that type.)

Trample
Traxos, Scourge of Kroog enters the battlefield tapped and doesn't untap during your untap step.
Whenever you cast a historic spell, untap Traxos. (Artifacts, legendaries, and Sagas are historic.)

Enchant creature
When Treachery enters the battlefield, untap up to five lands.
You control enchanted creature.

Whenever you crank Tread Mill, until end of turn, target creature gets +1/+2, gains vigilance, and becomes an artifact in addition to its other types.

(Transforms from Treasure Map.)
: Add .
, Sacrifice a Treasure: Draw a card.

Delve (Each card you exile from your graveyard while casting this spell pays for .)
Draw three cards.

Reveal cards from the top of your library until you reveal a nonland card, then put all cards revealed this way into your hand.

When Treasure Hunter enters the battlefield, you may return target artifact card from your graveyard to your hand.

When Treasure Keeper dies, reveal cards from the top of your library until you reveal a nonland card with converted mana cost 3 or less. You may cast that card without paying its mana cost. Put all revealed cards not cast this way on the bottom of your library in a random order.

When Treasure Mage enters the battlefield, you may search your library for an artifact card with converted mana cost 6 or greater, reveal it, put it into your hand, then shuffle your library.

, : Scry 1. Put a landmark counter on Treasure Map. Then if there are three or more landmark counters on it, remove those counters, transform Treasure Map, and create three Treasure tokens. (They're artifacts with ", Sacrifice this artifact: Add one mana of any color.")

: Draw a card.

(Theme color: )

Flying, protection from green

Return a land you control to its owner's hand: Untap Trench Behemoth. It gains hexproof until end of turn.
Whenever a land enters the battlefield under your control, target creature an opponent controls attacks during its controller's next combat phase if able.

Trample
When Trench Gorger enters the battlefield, you may search your library for any number of land cards, exile them, then shuffle your library. If you do, Trench Gorger has base power and base toughness each equal to the number of cards exiled this way.