Evolving Wilds

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Eclipsed Realms

As this land enters, choose Elemental, Elf, Faerie, Giant, Goblin, Kithkin, Merfolk, or Treefolk.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a spell of the chosen type or activate an ability of a source of the chosen type.

Luminollusk

Deathtouch
Vivid — When this creature enters, you gain life equal to the number of colors among permanents you control.

Twinflame Travelers

Flying
If a triggered ability of another Elemental you control triggers, it triggers an additional time.

Forest

Summit Sentinel

Prismabasher

Trample
Vivid — When this creature enters, up to X target creatures you control get +X/+X until end of turn, where X is the number of colors among permanents you control.

Island

Shinestriker

Flying
Vivid — When this creature enters, draw cards equal to the number of colors among permanents you control.

Explosive Prodigy

Vivid — When this creature enters, it deals X damage to target creature an opponent controls, where X is the number of colors among permanents you control.

Squawkroaster

Double strike
Vivid — Squawkroaster's power is equal to the number of colors among permanents you control.

Eclipsed Flamekin

When this creature enters, look at the top four cards of your library. You may reveal an Elemental, Island, or Mountain card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Prismatic Undercurrents

Vivid — When this enchantment enters, search your library for up to X basic land cards, where X is the number of colors among permanents you control. Reveal those cards, put them into your hand, then shuffle.
You may play an additional land on each of your turns.

Flamebraider

{T}: Add two mana in any combination of colors. Spend this mana only to cast Elemental spells or activate abilities of Elemental sources.

Mountain

Soulbright Seeker

As an additional cost to cast this spell, behold an Elemental or pay {2}. (To behold an Elemental, choose an Elemental you control or reveal an Elemental card from your hand.)
{R}: Target creature you control gains trample until end of turn. If this is the third time this ability has resolved this turn, add {R}{R}{R}{R}.