-1: Put a +1/+1 counter on each creature you control. Those creatures gain vigilance until end of turn.
-6: Create a white Avatar creature token. It has "This creature's power and toughness are each equal to your life total."
L:
4
{2}{W}{W}
Ajani's Chosen
Creature - Cat Soldier
Whenever an enchantment enters the battlefield under your control, create a 2/2 white Cat creature token. If that enchantment is an Aura, you may attach it to the token.
3 /
3
{1}{W}
Ajani's Pridemate
Creature - Cat Soldier
Whenever you gain life, put a +1/+1 counter on Ajani's Pridemate.
2 /
2
{1}{W}{W}
Ajani, Caller of the Pride
Legendary Planeswalker - Ajani
+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.
L:
4
{4}{W}{W}
Felidar Sovereign
Creature - Cat Beast
Vigilance, lifelink
At the beginning of your upkeep, if you have 40 or more life, you win the game.
4 /
6
{3}{W}
Healer of the Pride
Creature - Cat Cleric
Whenever another creature enters the battlefield under your control, you gain 2 life.
2 /
3
{1}{W}
Honor of the Pure
Enchantment
White creatures you control get +1/+1.
{3}{W}{W}{W}
Jareth, Leonine Titan
Legendary Creature - Cat Giant
Whenever Jareth, Leonine Titan blocks, it gets +7/+7 until end of turn.
{W}: Jareth gains protection from the color of your choice until end of turn.
4 /
7
{5}{W}{W}
Kemba's Legion
Creature - Cat Soldier
Vigilance
Kemba's Legion can block an additional creature each combat for each Equipment attached to Kemba's Legion.
4 /
6
{1}{W}{W}
Kemba, Kha Regent
Legendary Creature - Cat Cleric
At the beginning of your upkeep, create a 2/2 white Cat creature token for each Equipment attached to Kemba, Kha Regent.
2 /
4
{3}{W}
Leonin Abunas
Creature - Cat Cleric
Artifacts you control have hexproof. (They can't be the targets of spells or abilities your opponents control.)
2 /
5
{1}{W}
Leonin Den-Guard
Creature - Cat Soldier
As long as Leonin Den-Guard is equipped, it gets +1/+1 and has vigilance.
1 /
3
{W}
Leonin Elder
Creature - Cat Cleric
Whenever an artifact enters the battlefield, you may gain 1 life.
1 /
1
{W}{W}
Leonin Relic-Warder
Creature - Cat Cleric
When Leonin Relic-Warder enters the battlefield, you may exile target artifact or enchantment.
When Leonin Relic-Warder leaves the battlefield, return the exiled card to the battlefield under its owner's control.
2 /
2
{1}{W}
Leonin Shikari
Creature - Cat Soldier
You may activate equip abilities any time you could cast an instant.
2 /
2
{W}{W}
Leonin Skyhunter
Creature - Cat Knight
Flying
2 /
2
{1}{W}
Leonin Snarecaster
Creature - Cat Soldier
When Leonin Snarecaster enters the battlefield, you may tap target creature.
2 /
1
{1}{W}
Leonin Squire
Creature - Cat Soldier
When Leonin Squire enters the battlefield, return target artifact card with mana value 1 or less from your graveyard to your hand.
2 /
2
{5}{W}{W}
Raksha Golden Cub
Legendary Creature - Cat Soldier
Vigilance
As long as Raksha Golden Cub is equipped, Cat creatures you control get +2/+2 and have double strike.
3 /
4
{2}{W}{W}
Seht's Tiger
Creature - Cat
Flash (You may cast this spell any time you could cast an instant.)
When Seht's Tiger enters the battlefield, you gain protection from the color of your choice until end of turn. (You can't be targeted, dealt damage, or enchanted by anything of the chosen color.)
3 /
3
{2}{W}
Skyhunter Cub
Creature - Cat Knight
As long as Skyhunter Cub is equipped, it gets +1/+1 and has flying.
2 /
2
{2}{W}{W}
Skyhunter Patrol
Creature - Cat Knight
Flying, first strike (This creature can't be blocked except by creatures with flying or reach, and it deals combat damage before creatures without first strike.)
2 /
3
{2}{W}
Skyhunter Prowler
Creature - Cat Knight
Flying, vigilance (This creature can't be blocked except by creatures with flying or reach, and attacking doesn't cause this creature to tap.)
1 /
3
{1}{W}{W}
Skyhunter Skirmisher
Creature - Cat Knight
Flying, double strike
1 /
1
{4}{W}{W}
Spirit of the Hearth
Creature - Cat Spirit
Flying
You have hexproof. (You can't be the target of spells or abilities your opponents control.)
4 /
5
{W}
Steppe Lynx
Creature - Cat
Landfall -- Whenever a land enters the battlefield under your control, Steppe Lynx gets +2/+2 until end of turn.
0 /
1
{1}{W}
Sunspear Shikari
Creature - Cat Soldier
As long as Sunspear Shikari is equipped, it has first strike and lifelink.
2 /
2
{3}{W}
Taj-Nar Swordsmith
Creature - Cat Soldier
When Taj-Nar Swordsmith enters the battlefield, you may pay {X}. If you do, search your library for an Equipment card with mana value X or less, put that card onto the battlefield, then shuffle.
2 /
3
{W}
Trained Caracal
Creature - Cat
Lifelink (Damage dealt by this creature also causes you to gain that much life.)
1 /
1
{X}{W}{W}{W}
White Sun's Zenith
Instant
Create X 2/2 white Cat creature tokens. Shuffle White Sun's Zenith into its owner's library.
{1}{W}
Whitemane Lion
Creature - Cat
Flash
When Whitemane Lion enters the battlefield, return a creature you control to its owner's hand.