Mana is an obvious hurdle for any five-color deck, and having access to another rainbow land alongside Cavern and Plaza of Heroes is a big deal
All three give you commonly played mass removal in Damnation, Blasphemous Act and Cyclonic Rift
You never want to choose more than three colours (at least, most of the time) and if you want to be safe then having two is probably the best way
By the way, I loved Hierophant Bio-Titan the first time I played with it, and I definitely would find a slot in this deck if Im playing enough of these cards in there, especially Forgotten Ancient
Then, Li Shang Newly Promoted helps to banish characters that need to go, even if theyre readied
There are three types of cards in the TCG, along with six colors of Ink