Zhur-Taa Swine

Bloodrush — {1}{R}{G}, Discard Zhur-Taa Swine: Target attacking creature gets +5/+4 until end of turn.

Forest

Mountain

Savage Twister

Savage Twister deals X damage to each creature.

Act of Treason

Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.)

Spitebellows

When Spitebellows leaves the battlefield, it deals 6 damage to target creature.
Evoke {1}{R}{R} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Incinerate

Incinerate deals 3 damage to any target. A creature dealt damage this way can't be regenerated this turn.

Bogardan Firefiend

When Bogardan Firefiend dies, it deals 2 damage to target creature.

Volcanic Hammer

Volcanic Hammer deals 3 damage to any target.

Magma Jet

Magma Jet deals 2 damage to any target. Scry 2.

Rampant Growth

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

Flametongue Kavu

When Flametongue Kavu enters the battlefield, it deals 4 damage to target creature.

Werebear

{T}: Add {G}.
Threshold — Werebear gets +3/+3 as long as seven or more cards are in your graveyard.

Beetleback Chief

When Beetleback Chief enters the battlefield, create two 1/1 red Goblin creature tokens.

Gruul Guildgate

Gruul Guildgate enters the battlefield tapped.
{T}: Add {R} or {G}.

Viashino Pyromancer

When Viashino Pyromancer enters the battlefield, it deals 2 damage to target player or planeswalker.

Viridian Emissary

When Viridian Emissary dies, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.