Thematically, some of them have abilities that play well with other cats, like lifegain and +1/+1 counters, while other legendary cats are off doing their own thing
As you look forward into the future with this deck, you can set up for swingy attacks with Commander bombs like Overwhelming Stampede or to keep your creatures safe from harm with one of the best protection spells in the game, Heroic Intervention
Satoru, the Infiltrator Any ability to draw a card that isnt gated to only once a turn is a potentially busted card, and thats what we have in the very cheap to cast Satoru, the Infiltrator
It gets much better if you can profit from said land going into the graveyard
As such, many cards have abilities that care about the number of colors among permanents you control
It also wasn't because of whether you decided to use it on any given turn, or whether to cast it