I made this deck a while ago and have been constantly updating it as new sets come out. I originally created this deck for my love for cats and the fact that I just wanted to play magic with a non-premade deck. (This was the first hand-made deck I built). Now, I play this deck in casual and legacy tournaments. The main playstyle for this deck is to get as many cats out as fast as possible to boost stronger cats such as Pride Sovereign and boosting them further with cards such as Arahbo, Roar of the World, and Regal Caracal. The deck also focuses a lot on life gain, with cards such as Ajani's Welcome, Ajani's Pridemate, and Felidar Sovereign as a second win condition if you choose to go that route. This strategy is further boosted by many of the cats having lifelink and Regal Caracal which gives all other cats lifelink. (Lifelink makes it so that you gain life equal to the combat damage you deal, which is damage dealt during both attacking and blocking and is equal to the power of the creature).
To begin a ramp-up at the beginning of the game, the cheap cats include two Loam Lion and four Glitering Lynx which both cost . These cards are just to start the game and, in the late game, are used to power up the larger cats. Moving on to the cards that cost two mana, there are three Leonin Skyhunter which cost and have flying. There are also the two Ajani's Pridemate which cost and are good for the early game when you gain life to make larger creatures quickly. Moving on to the larger creatures which help more in the late game, first is the two Pride Sovereign which are great in the late-game because of the ability that adds +1/+1 for each cat you control, but is also great in the early game because of the low mana cost of and because you can have up to a 4/4 by turn three when combined with two smaller creatures. Another powerhouse in the deck is the Leonin Warleader for When attacking, this creature creates two 1/1 white cat tokens which are also tapped and attacking. One of the best cat creatures, and one of the main contributors to the success of this cat deck are the two Regal Caracal that cost and buff all of the other cats, giving them lifelink and an additional +1/+1. This card is great in combination with both small and large creatures because it turns small creatures into strong attackers and also gives lifelink to the larger creatures which give absurd amounts of life just by attacking. The last two creatures in the deck, Arahbo, Roar of the World, which costs , and Felidar Sovereign, which costs are also vital to the deck due to the versatility they give to it. Arahbo, Roar of the World gives huge buffs to other creatures, which, in combination with Regal Caracal, can give massive creatures and massive quantities of life. On the other hand, Felidar Sovereign has the ability to easily win the game with its ability which, if at the beginning of your upkeep, if you have forty or more life, you instantly win the game. This, in combination with all of the crazy ways to gain life this deck has, can be a simple, yet effective means to win the game.
The other cards in this deck contribute to the deck and help get rid of unwanted obstacles and help you get the cards you need. Cards such as Expose to Daylight, Prison Relam, and Skywhaler's Shot help to get rid of things your opponents have and also help you cycle through your library with the Scry ability to get the cards you need to win the game quicker. Likewise, cards such as Eladamri's Call, Hunter's Insight, and Track Down help you get the cards you want by searching for them directly in the library, drawing cards, and using the Scry ability. The other three cards that help you win are Ajani's Welcome, To Arms!, and Coat of Arms. Ajani's Welcome is a great early-game way to get some extra life and in combination with cards such as Leonin Warleader, which puts lots of new creatures onto the battlefield and, in turn, will score you a surplus of life. The card To Arms! helps you score lots of damage with a large all-in attack without worrying about blocking because you can just untap all of your creatures with two mana. The last card besides land, the Planeswalker, and the sideboard is Coat of Arms. This card is used mainly in specific situations and you might want to trade it out for a different card due to its price, however, if you ever need big creatures, and I mean, like, REALLY big creatures, this is your go-to card. For example, if you have ten cats out, each cat will get +9/+9, and with cards like Regal Caracal, and Pride Sovereign, these creatures will get massive and extremely powerful. The only planeswalker I included in this deck is Ajani, Strength of the Pride, because, in my opinion, it is the best and most well-rounded planeswalker for this cat deck. Some alternatives are Ajani, Adversary of Tyrants, and Ajani, Mentor of Heroes, but I prefer Ajani, Strength of the Pride because of the balance of insane amounts of life gain, lots of tokens, and the last ability is a board wipe for your opponents which has potential to win you the game. My land choice for this deck is very basic. It included six Forest, fifteen Plains, and four Sunpetal Grove, which can be swapped out with cards like Canopy Vista, Blossoming Sands, Tranquil Expanse, and other similar cards if you want to. The sideboard includes Kaheera, the Orphanguard for the Companion ability and other cards that help counter certain deck types. These include Rest in Peace for graveyard decks, Wheel of Sun and Moon for mill decks, and Heroic Intervention and Prowling Serpopard for blue decks which counter a lot of cards and destroy cards with spells. Also, in the sideboard are some alternative Planeswalkers. I haven't found any good cards to counter burn decks, but I would greatly appreciate it if someone figured out a simple yet elegant solution to that. Similar to Coat of Arms, some cards that I would also recommend for this deck that are more expensive are Urza's Incubator and Doubling Season because they are fun to play with and powerful cards. Urza's Incubator can help you build a massive army for a low mana cost due to most of the cats being two plains mana and a few colorless. (These include cards like Arahbo, Roar of the World, Regal Caracal, and Leonin Warleader). Doubling Season is also fun to play with because of the sheer quantity of tokens you can create and have on the board at the same time. This concludes my summary of my cat deck, and to anyone reading this, have a wonderful rest of your day!
p.s. The maybeboard is part of the sideboard, but I didn't put it in the sideboard tab because it threw off the cost. (I only play with Kaheera, the Orphanguard in the sideboard.)