Mountain

Cliffrunner Behemoth

This creature has haste as long as you control a red permanent.
This creature has lifelink as long as you control a white permanent.

Gift of the Gargantuan

Look at the top four cards of your library. You may reveal a creature card and/or a land card from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in any order.

Cerodon Yearling

Rupture Spire

This land enters tapped.
When this land enters, sacrifice it unless you pay {1}.
{T}: Add one mana of any color.

Rip-Clan Crasher

Exploding Borders

Domain — Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. Exploding Borders deals X damage to target player or planeswalker, where X is the number of basic land types among lands you control.

Titanic Ultimatum

Until end of turn, creatures you control get +5/+5 and gain first strike, trample, and lifelink.

Jungle Shrine

This land enters tapped.
{T}: Add {R}, {G}, or {W}.

Viashino Sandsprinter

Trample, haste
At the beginning of the end step, return this creature to its owner's hand. (Return it only if it's on the battlefield.)
Cycling {R} ({R}, Discard this card: Draw a card.)

Forest

Lightning Helix

Lightning Helix deals 3 damage to any target and you gain 3 life.

Wild Nacatl

This creature gets +1/+1 as long as you control a Mountain.
This creature gets +1/+1 as long as you control a Plains.

Kird Ape

This creature gets +1/+2 as long as you control a Forest.

Bloodbraid Elf

Haste (This creature can attack and {T} as soon as it comes under your control.)
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.)