Mountain

Faithless Looting

Draw two cards, then discard two cards.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Wooded Ridgeline

({T}: Add {R} or {G}.)
Wooded Ridgeline enters tapped.

Oliphaunt

Trample
Whenever Oliphaunt attacks, another target creature you control gets +2/+0 and gains trample until end of turn.
Mountaincycling {1} ({1}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

Forest

Reckless Barbarian

Sacrifice Reckless Barbarian: Add {R}{R}.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Avenging Hunter

Trample
When Avenging Hunter enters, you take the initiative.

Snakeskin Veil

Put a +1/+1 counter on target creature you control. It gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

Burning-Tree Emissary

When Burning-Tree Emissary enters, add {R}{G}.

Elven Farsight

Scry 3, then you may reveal the top card of your library. If it's a creature card, draw a card.

Lotus Petal

{T}, Sacrifice Lotus Petal: Add one mana of any color.

Wild Cantor

({R/G} can be paid with either {R} or {G}.)
Sacrifice Wild Cantor: Add one mana of any color.