Rising Miasma

All creatures get -2/-2 until end of turn.
Awaken 3—{5}{B}{B} (If you cast this spell for {5}{B}{B}, also put three +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It's still a land.)

Forest

Humble Naturalist

{T}: Add one mana of any color. Spend this mana only to cast a creature spell.

Sovereign's Bite

Target player loses 3 life and you gain 3 life.

Bountiful Harvest

You gain 1 life for each land you control.

Snarespinner

Reach
Whenever Snarespinner blocks a creature with flying, Snarespinner gets +2/+0 until end of turn.

Child of Night

Arbor Colossus

Reach
{3}{G}{G}{G}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)
When Arbor Colossus becomes monstrous, destroy target creature with flying an opponent controls.

Entangling Vines

Enchant tapped creature
Enchanted creature doesn't untap during its controller's untap step.

Disentomb

Return target creature card from your graveyard to your hand.

Druid of the Cowl

Assassinate

Sacred Wolf

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Quag Sickness

Enchant creature
Enchanted creature gets -1/-1 for each Swamp you control.

Greater Basilisk

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Goremand

As an additional cost to cast this spell, sacrifice a creature.
Flying
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
When Goremand enters, each opponent sacrifices a creature.

Kraul Stinger

Rabid Bite

Target creature you control deals damage equal to its power to target creature you don't control.

Wildborn Preserver

Flash (You may cast this spell any time you could cast an instant.)
Reach (This creature can block creatures with flying.)
Whenever another non-Human creature you control enters, you may pay {X}. When you do, put X +1/+1 counters on this creature.

Plummet

Giant Spider

Reach (This creature can block creatures with flying.)

Devouring Swarm

Flying
Sacrifice a creature: Devouring Swarm gets +1/+1 until end of turn.

Gaze of Granite

Destroy each nonland permanent with mana value X or less.

Doom Blade

Cairn Wanderer

Changeling (This card is every creature type.)
As long as a creature card with flying is in a graveyard, Cairn Wanderer has flying. The same is true for fear, first strike, double strike, deathtouch, haste, landwalk, lifelink, protection, reach, trample, shroud, and vigilance.

Splinterfright

Trample
Splinterfright's power and toughness are each equal to the number of creature cards in your graveyard.
At the beginning of your upkeep, mill two cards.

Duress

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

Ulvenwald Behemoth

Trample, haste
Other creatures you control get +1/+1 and have trample and haste.

Ulvenwald Oddity

Trample, haste
{5}{G}{G}: Transform Ulvenwald Oddity.

Ulvenwald Oddity // Ulvenwald Behemoth

Nissa's Triumph

Search your library for up to two basic Forest cards. If you control a Nissa planeswalker, instead search your library for up to three land cards. Reveal those cards, put them into your hand, then shuffle.

Taste of Blood

Taste of Blood deals 1 damage to target player or planeswalker and you gain 1 life.

Greenwood Sentinel

Vigilance (Attacking doesn't cause this creature to tap.)

Almighty Brushwagg

Trample
{3}{G}: Almighty Brushwagg gets +3/+3 until end of turn.

Arachnus Web

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.
At the beginning of the end step, if enchanted creature's power is 4 or greater, destroy Arachnus Web.

Swamp

Distress

Target player reveals their hand. You choose a nonland card from it. That player discards that card.

Mind Rot

Ram Through

Target creature you control deals damage equal to its power to target creature you don't control. If the creature you control has trample, excess damage is dealt to that creature's controller instead.

Davriel's Shadowfugue

Target player discards two cards and loses 2 life.

Naturalize

Llanowar Visionary

When Llanowar Visionary enters, draw a card.
{T}: Add {G}.

New Horizons

Enchant land
When this Aura enters, put a +1/+1 counter on target creature you control.
Enchanted land has "{T}: Add two mana of any one color."