Regardless of which kind of player you are, I believe that in every colour theres a handful of great cards that should be staples and that also dont break the bank
This eight-mana blue, red, and green 7/5 grants all of your creatures haste, which is already pretty decent, but most importantly, it comes with two instances of cascade
A riff on its predecessor, persist, undying takes a different approach to make your creatures stronger when they recur and makes it even harder to deal with them profitably
Jodah also "cascades"when casting a Legendary spell with Jodah in play, the player exiles cards from the top of their library until revealing a Legendary spell of a lower mana cost and casts it for free
However, the main target here will be Monkey.D.Luffy (ST01-012), who alone can change the course of a game (but we'll get to that later)