Well then, you've forgotten that large Magic sets actually have five rarities and not four
Rootweaver Druid is one of those cards, letting players search for up to three extra basic lands when it comes into play, under the condition that one of them has to go to you
If you look at the other decks, their themes have only been featured in a couple of sets
Dog // Cat Token Tokens 2 Dog // Cat (traditional foil, new art) 2 Cat (BNG) // Warrior (AKH) 1 Cat Beast (ZNR) // Shapeshifter (2XM) 1 Cat Beast (ZNR) // Rat (C17) 1 Cat (SNC) // Rat (C17) 1 Cat (SNC) // Dog (SNC) 1 Cat (C17) // Citizen (SNC) 1 Cat (C17) // Dog (SNC) 1 Cat (AKH) // Dog (SNC) 1 Cat (AKH) // Citizen (SNC) 1 Shapeshifter (KHM) // Rat (C17) These cards feature paws -itively wag -nificent new art by Allison Carl, Alayna Danner, Jakob Eirich, Nicole Gustafsson, Fiona Hsieh, Jack Hughes, Nana Qi, and Andrea Radeck
That's not to say cards like Champion of Wits aren't useful, but it just feels as though there were better options out there, even at the time that could have helped the deck stay closer to a theme and identity