Gloomshrieker

Menace (This creature can't be blocked except by two or more creatures.)
When Gloomshrieker enters the battlefield, return target permanent card from your graveyard to your hand.
If Gloomshrieker would die, exile it instead.

Feral Prowler

Cat Warriors

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

Kemba's Skyguard

Flying
When Kemba's Skyguard enters the battlefield, you gain 2 life.

Chrome Cat

When Chrome Cat enters the battlefield, scry 1.

Chrome Prowler

Flash
When Chrome Prowler enters the battlefield, tap target creature an opponent controls.

Garrison Cat

When Garrison Cat dies, create a 1/1 white Human Soldier creature token.

Highcliff Felidar

Vigilance
When Highcliff Felidar enters the battlefield, for each opponent, choose a creature with the greatest power among creatures that player controls. Destroy those creatures.

Kemba, Kha Enduring

Whenever Kemba, Kha Enduring or another Cat enters the battlefield under your control, attach up to one target Equipment you control to that creature.
Equipped creatures you control get +1/+1.
{3}{W}{W}: Create a 2/2 white Cat creature token.

Brimaz, King of Oreskos

Vigilance
Whenever Brimaz, King of Oreskos attacks, create a 1/1 white Cat Soldier creature token with vigilance that's attacking.
Whenever Brimaz blocks a creature, create a 1/1 white Cat Soldier creature token with vigilance that's blocking that creature.

K-9, Mark I

Negative — As long as K-9, Mark I is untapped, other legendary creatures you control have ward {1}.
Affirmative — {1}{U}, {T}: Target legendary creature can't be blocked this turn.
Doctor's companion (You can have two commanders if the other is the Doctor.)

Edgewall Pack

Menace (This creature can't be blocked except by two or more creatures.)
When Edgewall Pack enters the battlefield, create a 1/1 black Rat creature token with "This creature can't block."

Boros Mastiff

Battalion — Whenever Boros Mastiff and at least two other creatures attack, Boros Mastiff gains lifelink until end of turn. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

Corpse Cur

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
When Corpse Cur enters the battlefield, you may return target creature card with infect from your graveyard to your hand.

Jetmir, Nexus of Revels

Creatures you control get +1/+0 and have vigilance as long as you control three or more creatures.
Creatures you control also get +1/+0 and have trample as long as you control six or more creatures.
Creatures you control also get +1/+0 and have double strike as long as you control nine or more creatures.

Hunting Cheetah

Whenever Hunting Cheetah deals damage to an opponent, you may search your library for a Forest card, reveal that card, put it into your hand, then shuffle.

Hungry Lynx

Cats you control have protection from Rats. (They can't be blocked, targeted, or dealt damage by Rats.)
At the beginning of your end step, target opponent creates a 1/1 black Rat creature token with deathtouch.
Whenever a Rat dies, put a +1/+1 counter on each Cat you control.

Generous Stray

When Generous Stray enters the battlefield, draw a card.

Grizzled Leotau

Enlightened Ascetic

When Enlightened Ascetic enters the battlefield, you may destroy target enchantment.

Dreadhound

When Dreadhound enters the battlefield, mill three cards. (Put the top three cards of your library into your graveyard.)
Whenever a creature dies or a creature card is put into a graveyard from a library, each opponent loses 1 life.

Jungle Lion

Champion of Arashin

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Fleecemane Lion

{3}{G}{W}: Monstrosity 1. (If this creature isn't monstrous, put a +1/+1 counter on it and it becomes monstrous.)
As long as Fleecemane Lion is monstrous, it has hexproof and indestructible.

Feline Sovereign

Other Cats you control get +1/+1 and have protection from Dogs.
Whenever one or more Cats you control deal combat damage to a player, destroy up to one target artifact or enchantment that player controls.

Horned Cheetah

Whenever Horned Cheetah deals damage, you gain that much life.

Kemba, Kha Regent

At the beginning of your upkeep, create a 2/2 white Cat creature token for each Equipment attached to Kemba, Kha Regent.

Jewel Thief

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

Canyon Wildcat

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

Alpine Watchdog

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

Felidar Sovereign

Vigilance, lifelink
At the beginning of your upkeep, if you have 40 or more life, you win the game.

Fleetfoot Panther

Flash
When Fleetfoot Panther enters the battlefield, return a green or white creature you control to its owner's hand.

Goldhound

First strike
Menace (This creature can't be blocked except by two or more creatures.)
{T}, Sacrifice Goldhound: Add one mana of any color.

Felidar Cub

Sacrifice Felidar Cub: Destroy target enchantment.

Civil Servant

Whenever Civil Servant attacks, you may tap another untapped Citizen you control. If you do, Civil Servant gets +1/+0 and gains lifelink until end of turn.

Guma

Bolt Hound

Haste (This creature can attack and {T} as soon as it comes under your control.)
Whenever Bolt Hound attacks, other creatures you control get +1/+0 until end of turn.