One other interesting area of note Imperial Seal and Vampiric Tutor are ideal for showcasing the importance of card advantage vs card quality
For us, it serves as an example for all those cards that people panic over when they first see it, but then turns out to be not as bad as they thought
You can find an Isshin, Two Heavens as One list for a little over $60
Super-huge, in-your-face monsters exploding out of the cards at you, hitting you in the cornea like a comic book onomatopoeia
For Eldrazi fans, Modern Horizons 3 has some heavy hitters
The options in Standard for nongreen decks are a bit limited, but there are some good ones: Arcane Signet was designed specifically with Brawl in mind and was put in the paper Brawl decks Wizards of the Coast published to support the format when it first came out