Double strike

Eternalize {3}{W}{W} ({3}{W}{W}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Cat with no mana cost. Eternalize only as a sorcery.)

Whenever a creature enters the battlefield under your control, you gain 1 life.

+1: Put a +1/+1 counter on up to one target creature.

-3: Target creature gains flying and double strike until end of turn.

-8: Create X 2/2 white Cat creature tokens, where X is your life total.

{T}: Add one mana of any color in your commander's color identity.

Choose two --

• Destroy all artifacts.

• Destroy all enchantments.

• Destroy all creatures with mana value 3 or less.

• Destroy all creatures with mana value 4 or greater.

As an additional cost to cast this spell, sacrifice a creature or pay {3}.

Whenever you cast a creature spell, draw a card.

Whenever a creature you control attacks, you may put a quest counter on Beastmaster Ascension.

As long as Beastmaster Ascension has seven or more quest counters on it, creatures you control get +5/+5.

Changeling (This card is every creature type.)

As Bloodline Pretender enters the battlefield, choose a creature type.

Whenever another creature of the chosen type enters the battlefield under your control, put a +1/+1 counter on Bloodline Pretender.

{G}{W}: Bronzehide Lion gains indestructible until end of turn.

When Bronzehide Lion dies, return it to the battlefield. It's an Aura enchantment with enchant creature you control and "{G}{W}: Enchanted creature gains indestructible until end of turn," and it loses all other abilities.

At the beginning of your upkeep, look at the top card of your library. If it's a creature or planeswalker card, you may reveal it and put it into your hand. If you don't put the card into your hand, you may put it on the bottom of your library.

({T}: Add {G} or {W}.)

Canopy Vista enters the battlefield tapped unless you control two or more basic lands.

Chain Reaction deals X damage to each creature, where X is the number of creatures on the battlefield.

({T}: Add {R} or {G}.)

Cinder Glade enters the battlefield tapped unless you control two or more basic lands.

{T}: Add one mana of any color in your commander's color identity.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Choose one --

• Prevent all combat damage that would be dealt this turn.

• Regenerate target creature.

• Counter target spell that targets you.

{T}: Add {C}.

{1}, {T}: Until end of turn, your opponents and creatures your opponents control with hexproof can be the targets of spells and abilities you control as though they didn't have hexproof.

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

{T}: Add one mana of any color that a land an opponent controls could produce.

Landfall -- Whenever a land enters the battlefield under your control, choose one --

• Create a 2/2 white Cat Beast creature token.

• Put a +1/+1 counter on each creature you control. Those creatures gain vigilance until end of turn.

Vigilance, lifelink

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

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.

{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.

Flash

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

Commander creatures you own have "Whenever you cast a spell that shares a creature type with this creature, draw a card. This ability triggers only once each turn."

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

({T}: Add {G}.)

As Fortified Village enters the battlefield, you may reveal a Forest or Plains card from your hand. If you don't, Fortified Village enters the battlefield tapped.

{T}: Add {G} or {W}.

{T}: Add one mana of any color.

{2}, {T}: Exile target card from a graveyard.

Whenever a creature enters the battlefield under your control, Impact Tremors deals 1 damage to each opponent.

Changeling (This card is every creature type.)

When Irregular Cohort enters the battlefield, create a 2/2 colorless Shapeshifter creature token with changeling.

First strike

{3}{W}{W}: Attacking creatures you control get +X/+X until end of turn, where X is the number of attacking creatures.

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

Whenever Jedit Ojanen of Efrava attacks or blocks, create a 2/2 green Cat Warrior creature token with forestwalk.

If you would create one or more tokens, you may instead create that many 2/2 green Cat creature tokens with haste or that many 3/1 green Dog creature tokens with vigilance.

Jungle Shrine enters the battlefield tapped.

{T}: Add {R}, {G}, or {W}.

Kabira Takedown deals damage equal to the number of creatures you control to target creature or planeswalker.

Kabira Plateau enters the battlefield tapped.

{T}: Add {W}.

Companion -- Each creature card in your starting deck is a Cat, Elemental, Nightmare, Dinosaur, or Beast card. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.)

Vigilance

Each other creature you control that's a Cat, Elemental, Nightmare, Dinosaur, or Beast gets +1/+1 and has vigilance.

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

Other Cats you control get +2/+1.

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.

Whenever Leonin Warleader attacks, create two 1/1 white Cat creature tokens with lifelink that are tapped and attacking.

Vigilance

When Loyal Warhound enters the battlefield, if an opponent controls more lands than you, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle.

Your opponents can't cast spells during combat.

Whenever a creature you control deals combat damage to a player, goad each creature that player controls. (Until your next turn, those creatures attack each combat if able and attack a player other than you if able.)

Creatures you control are every creature type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

{3}, {T}: Create a 2/2 blue Shapeshifter creature token with changeling. (It is every creature type.)

Changeling (This card is every creature type.)

{X}: Until end of turn, creatures you control have base power and toughness X/X and gain all creature types.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

Choose one --

• Naya Charm deals 3 damage to target creature.

• Return target card from a graveyard to its owner's hand.

• Tap all creatures target player controls.

When Oreskos Explorer enters the battlefield, search your library for up to X Plains cards, where X is the number of players who control more lands than you. Reveal those cards, put them into your hand, then shuffle.

Other Dogs you control get +1/+1.

Whenever Pack Leader attacks, prevent all combat damage that would be dealt this turn to Dogs you control.

Path of Ancestry enters the battlefield tapped.

{T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

As long as it's your turn, creature tokens you control get +1/+4.

{3}{W}: Create a 1/1 white Soldier creature token.

Partner (You can have two commanders if both have partner.)

Pride Sovereign gets +1/+1 for each other Cat you control.

{W}, {T}, Exert Pride Sovereign: Create two 1/1 white Cat creature tokens with lifelink. (An exerted creature won't untap during your next untap step.)

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)

As Radiant Destiny enters the battlefield, choose a creature type.

Creatures you control of the chosen type get +1/+1. As long as you have the city's blessing, they also have vigilance.

Other Cats you control get +1/+1 and have lifelink.

When Regal Caracal enters the battlefield, create two 1/1 white Cat creature tokens with lifelink.

You have no maximum hand size.

{T}: Add {C}.

Whenever you cast a Dog spell, create a 1/1 green Cat creature token.

Whenever you cast a Cat spell, create a 1/1 white Dog creature token.

{R}{G}{W}, {T}: Rin and Seri, Inseparable deals damage to any target equal to the number of Dogs you control. You gain life equal to the number of Cats you control.

Whenever a creature or enchantment enters the battlefield under your control this turn, draw a card.

Flashback {2}{G}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

At the beginning of your end step, if a creature died this turn, put a +1/+1 counter on Sabertooth Mauler and untap it.

For each token you control, create a token that's a copy of that permanent.

Selesnya Sanctuary enters the battlefield tapped.

When Selesnya Sanctuary enters the battlefield, return a land you control to its owner's hand.

{T}: Add {G}{W}.

Sacrifice Selfless Savior: Another target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Draw a card for each creature you control.

Ferocious -- You gain 4 life for each creature you control with power 4 or greater.

Changeling (This card is every creature type.)

Creatures target player controls get +0/+1 and gain all creature types until end of turn.

Flying

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)

Lieutenant -- As long as you control your commander, other creatures you control have melee.

{T}: Add {C}{C}.

Spikefield Hazard deals 1 damage to any target. If a permanent dealt damage this way would die this turn, exile it instead.

Spikefield Cave enters the battlefield tapped.

{T}: Add {R}.

When Spirited Companion enters the battlefield, draw a card.

Destroy target artifact or enchantment, then populate. (Create a token that's a copy of a creature token you control.)

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)

Equip {1}

Exile target creature. Its controller gains life equal to its power.

{4}{G/P}: Transform Tarkir Duneshaper. Activate only as a sorcery. ({G/P} can be paid with either {G} or 2 life.)

Trample

Changeling (This card is every creature type.)

Whenever an opponent casts a spell, you may put a +1/+1 counter on Taurean Mauler.

Temple of Plenty enters the battlefield tapped.

When Temple of Plenty enters the battlefield, scry 1.

{T}: Add {G} or {W}.

{1}{G}: You may return another creature you control to its owner's hand. If you do, Temur Sabertooth gains indestructible until end of turn.

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

You have no maximum hand size.

{T}: Add {C}.

Flying

Whenever one or more other creatures with power 2 or less enter the battlefield under your control, draw a card. This ability triggers only once each turn.

Flash

When Whitemane Lion enters the battlefield, return a creature you control to its owner's hand.

Hideaway 4 (When this land enters the battlefield, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)

Windbrisk Heights enters the battlefield tapped.

{T}: Add {W}.

{W}, {T}: You may play the exiled card without paying its mana cost if you attacked with three or more creatures this turn.