Thriving Grove

This land enters tapped. As it enters, choose a color other than green.
{T}: Add {G} or one mana of the chosen color.

Hog-Monkey Rampage

Choose target creature you control and target creature an opponent controls. Put a +1/+1 counter on the creature you control if it has power 4 or greater. Then those creatures fight each other. (Each deals damage equal to its power to the other.)

Seismic Tutelage

Enchant creature
When this Aura enters, put a +1/+1 counter on enchanted creature.
Whenever enchanted creature attacks, double the number of +1/+1 counters on it.

Saber-Tooth Moose-Lion

Reach
Forestcycling {2} ({2}, Discard this card: Search your library for a Forest card, reveal it, put it into your hand, then shuffle.)

Raucous Audience

{T}: Add {G}. If you control a creature with power 4 or greater, add {G}{G} instead.

Ostrich-Horse

When this creature enters, mill three cards. You may put a land card from among them into your hand. If you don't, put a +1/+1 counter on this creature. (To mill three cards, put the top three cards of your library into your graveyard.)

Forest

Turtle-Duck

{3}: Until end of turn, this creature has base power 4 and gains trample.

Frog-Squirrels

Reach (This creature can block creatures with flying.)

Flopsie, Bumi's Buddy

When Flopsie enters, put a +1/+1 counter on each creature you control.
Each creature you control with power 4 or greater can't be blocked by more than one creature.

Eel-Hounds

Trample (This creature can deal excess combat damage to the player it's attacking.)
Whenever this creature attacks, another target creature you control gets +2/+2 and gains trample until end of turn.

Mechanical Glider

When this Equipment enters, attach it to target creature you control.
Equipped creature has flying. (It can't be blocked except by creatures with flying or reach.)
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Match the Odds

Create a 1/1 white Ally creature token. Put a +1/+1 counter on it for each creature your opponents control.

Big Creatures

Battle with the biggest
(Theme color: {G})

Hippo-Cows

Trample (This creature can deal excess combat damage to the player it's attacking.)