Shivan Dragon

Flying
{R}: This creature gets +1/+0 until end of turn.

Giant Growth

Target creature gets +3/+3 until end of turn.

Dark Ritual

Detonate

Destroy target artifact with mana value X. It can't be regenerated. Detonate deals X damage to that artifact's controller.

Demonic Tutor

Search your library for a card, put that card into your hand, then shuffle.

Kird Ape

Kird Ape gets +1/+2 as long as you control a Forest.

Lightning Bolt

Lightning Bolt deals 3 damage to any target.

Terror

Destroy target nonartifact, nonblack creature. It can't be regenerated.

Llanowar Elves

Ankh of Mishra

Whenever a land enters, Ankh of Mishra deals 2 damage to that land's controller.

Taiga

Shatter

Rock Hydra

Rock Hydra enters with X +1/+1 counters on it.
For each 1 damage that would be dealt to Rock Hydra, if it has a +1/+1 counter on it, remove a +1/+1 counter from it and prevent that 1 damage.
{R}: Prevent the next 1 damage that would be dealt to Rock Hydra this turn.
{R}{R}{R}: Put a +1/+1 counter on Rock Hydra. Activate only during your upkeep.

Channel

Until end of turn, any time you could activate a mana ability, you may pay 1 life. If you do, add {C}.

Badlands

Bayou

Disintegrate

Disintegrate deals X damage to any target. If it's a creature, it can't be regenerated this turn, and if it would die this turn, exile it instead.

Black Vise

As Black Vise enters, choose an opponent.
At the beginning of the chosen player's upkeep, Black Vise deals X damage to that player, where X is the number of cards in their hand minus 4.

Birds of Paradise

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Howling Mine

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.