Mountain

Chord of Calling

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.

Charging War Boar

Haste (This creature can attack and {T} as soon as it comes under your control.)
As long as you control a Domri planeswalker, this creature gets +1/+1 and has trample. (It can deal excess damage to the player or planeswalker it's attacking.)

Ragefire

Ragefire deals 3 damage to target creature.

Gravel-Hide Goblin

{3}{G}: This creature gets +2/+2 until end of turn.

Atarka, World Render

Flying, trample
Whenever a Dragon you control attacks, it gains double strike until end of turn.

Bolrac-Clan Crusher

{T}, Remove a +1/+1 counter from a creature you control: This creature deals 2 damage to any target.

Zhur-Taa Goblin

Riot (This creature enters with your choice of a +1/+1 counter or haste.)

Clamor Shaman

Riot (This creature enters with your choice of a +1/+1 counter or haste.)
Whenever this creature attacks, target creature an opponent controls can't block this turn.

Feral Maaka

Mossfire Valley

Sagittars' Volley

Destroy target creature with flying. Sagittars' Volley deals 1 damage to each creature with flying your opponents control.

Stony Strength

Put a +1/+1 counter on target creature you control. Untap that creature.

Burn Bright

Creatures you control get +2/+0 until end of turn.

Prowling Serpopard

This spell can't be countered.
Creature spells you control can't be countered.

Domri, City Smasher

+2: Creatures you control get +1/+1 and gain haste until end of turn.
−3: Domri deals 3 damage to any target.
−8: Put three +1/+1 counters on each creature you control. Those creatures gain trample until end of turn.

Rampaging Rendhorn

Gruul Guildgate

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

Forest

Glass of the Guildpact

Multicolored creatures you control get +1/+1.

Frenzied Arynx

Riot (This creature enters with your choice of a +1/+1 counter or haste.)
Trample
{4}{R}{G}: This creature gets +3/+0 until end of turn.

Domri's Nodorog

Trample
When this creature enters, you may search your library and/or graveyard for a card named Domri, City Smasher, reveal it, and put it into your hand. If you search your library this way, shuffle.

End-Raze Forerunners

Vigilance, trample, haste
When this creature enters, other creatures you control get +2/+2 and gain vigilance and trample until end of turn.