For those unfamiliar with the term, a top-down designed set is one where a sets setting, story, and theme are established first, and the mechanics are designed around that setting
And the player can also include colorless cards
The body portion of the card is a 1/1 that grows whenever you cast a non-green and non-colorless spell, so there's certainly some value there in trying to stack your deck and start growing an evolving threat
Mechanically Unusual Fighter: Unlike your average Synchro deck, the Flower Cardians don't have to worry about adding up levels as their Tuners automatically make the Synchro Materials level 2, which is very necessary given that some of their monsters have absurdly high levels (including a level 11 Tuner) to fit their Hanafuda motif
Card games are one of my favorite hobbies and Ive been spending the past 8 years playing Pokmon TCG every weekend and on some occasions, travelling to play on larger events