Trample
Whenever Primeval Titan enters the battlefield or attacks, you may search your library for up to two land cards, put them onto the battlefield tapped, then shuffle your library.

Valakut, the Molten Pinnacle enters the battlefield tapped.
Whenever a Mountain enters the battlefield under your control, if you control at least five other Mountains, you may have Valakut, the Molten Pinnacle deal 3 damage to target creature or player.
: Add to your mana pool.

Search your library for a basic land card and put that card onto the battlefield tapped. Then shuffle your library.

You may play an additional land this turn.
Draw a card.

Sacrifice any number of lands. Search your library for that many land cards, put them onto the battlefield tapped, then shuffle your library.

Landfall - Whenever a land enters the battlefield under your control, you may put a quest counter on Khalni Heart Expedition.
Remove three quest counters from Khalni Heart Expedition and sacrifice it: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle your library.

, Sacrifice Terramorphic Expanse: Search your library for a basic land card and put it onto the battlefield tapped. Then shuffle your library.

, Sacrifice Evolving Wilds : Search your library for a basic land card and put it onto the battlefield tapped. Then shuffle your library.

Lands you control are every basic land type in addition to their other types.

Pyroclasm deals 2 damage to each creature.

As an additional cost to cast Harrow, sacrifice a land.
Search your library for up to two basic land cards and put them onto the battlefield. Then shuffle your library.

Destroy target artifact or enchantment. Its controller gains 4 life.

Volcanic Fallout can't be countered.
Volcanic Fallout deals 2 damage to each creature and each player.

Choose two - Target player gains 7 life; or put target noncreature permanent on top of its owner's library; or target player shuffles his or her graveyard into his or her library; or search your library for a creature card, reveal it, put it into your hand, then shuffle your library.

Raging Ravine enters the battlefield tapped.
: Add or to your mana pool.
: Until end of turn, Raging Ravine becomes a 3/3 red and green Elemental creature with "Whenever this creature attacks, put a +1/+1 counter on it." It's still a land.

When Obstinate Baloth enters the battlefield, you gain 4 life.
If a spell or ability an opponent controls causes you to discard Obstinate Baloth, put it onto the battlefield instead of putting it into your graveyard.

Counter target blue instant spell.

If Leyline of Sanctity is in your opening hand, you may begin the game with it on the battlefield.
You have hexproof.