Cat Warriors

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

Jewel Thief

Vigilance, trample
When this creature enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Keeper of Fables

Whenever one or more non-Human creatures you control deal combat damage to a player, draw a card.

Explore

You may play an additional land this turn.
Draw a card.

Wily Bandar

{2}{G}: This creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Sylvan Anthem

Green creatures you control get +1/+1.
Whenever a green creature you control enters, scry 1.

Academy Manufactor

If you would create a Clue, Food, or Treasure token, instead create one of each.

Utopia Sprawl

Enchant Forest
As this Aura enters, choose a color.
Whenever enchanted Forest is tapped for mana, its controller adds an additional one mana of the chosen color.

Forest

Spider-Ham, Peter Porker

When Spider-Ham enters, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")
Animal May-Ham — Other Spiders, Boars, Bats, Bears, Birds, Cats, Dogs, Frogs, Jackals, Lizards, Mice, Otters, Rabbits, Raccoons, Rats, Squirrels, Turtles, and Wolves you control get +1/+1.

Lucky the Pizza Dog

Whenever you cast a Cat, Dog, or Hero spell, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")
At the beginning of each end step, if you gained life this turn, put a +1/+1 counter on Lucky.

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 this creature.