Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Quirion Ranger

Return a Forest you control to its owner's hand: Untap target creature. Activate only once each turn.

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.)

Akoum Hellhound

Landfall — Whenever a land you control enters, Akoum Hellhound gets +2/+2 until end of turn.

Mountain

Nature's Claim

Destroy target artifact or enchantment. Its controller gains 4 life.

Plated Geopede

First strike
Landfall — Whenever a land you control enters, Plated Geopede gets +2/+2 until end of turn.

Llanowar Scout

{T}: You may put a land card from your hand onto the battlefield.

Burning-Tree Emissary

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

Territorial Scythecat

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Landfall — Whenever a land you control enters, put a +1/+1 counter on Territorial Scythecat.