Helm of Obedience

{X}, {T}: Target opponent mills a card, then repeats this process until a creature card or X cards have been put into their graveyard this way, whichever comes first. If one or more creature cards were put into that graveyard this way, sacrifice Helm of Obedience and put one of them onto the battlefield under your control. X can't be 0.

Forest

Taste of Paradise

As an additional cost to cast this spell, you may pay {1}{G} any number of times.
You gain 3 life plus an additional 3 life for each additional {1}{G} you paid.

Bitterblade Warrior

You may exert Bitterblade Warrior as it attacks. When you do, it gets +1/+0 and gains deathtouch until end of turn. (An exerted creature won't untap during your next untap step.)

Killer Bees

Flying
{G}: Killer Bees gets +1/+1 until end of turn.

Aggressive Mammoth

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Other creatures you control have trample.

Scryb Sprites

Vitalize

Whirling Dervish

Protection from black
At the beginning of each end step, if Whirling Dervish dealt damage to an opponent this turn, put a +1/+1 counter on it.

Blossoming Wreath

You gain life equal to the number of creature cards in your graveyard.

Giant Growth

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

Llanowar Druid

{T}, Sacrifice Llanowar Druid: Untap all Forests.

Choking Vines

Cast this spell only during the declare blockers step.
X target attacking creatures become blocked. Choking Vines deals 1 damage to each of those creatures. (This spell works on creatures that can't be blocked.)

Rogue Elephant

When Rogue Elephant enters, sacrifice it unless you sacrifice a Forest.

Stream of Life

Concordant Crossroads

Verdant Force

At the beginning of each upkeep, create a 1/1 green Saproling creature token.

Vivien of the Arkbow

+2: Put two +1/+1 counters on up to one target creature.
−3: Target creature you control deals damage equal to its power to target creature you don't control.
−9: Creatures you control get +4/+4 and gain trample until end of turn.