There is plenty thats copyrightable in the game all the artwork, and the way its written but not the underlying rules themselves. Thus, Upper Deck, if the case proceeds, is arguing a breach of contract and fiduciary duty
Inferno Titan offers some removal with its Arc Lightningesque enters-the-battlefield / attack trigger and is an extremely fast clock thanks to its pump abilities, often killing the opponent with just two attacks
Losheel, Clockwork Scholar Losheel, Clockwork Scholar gives artifact creature decks some real oomph thanks to the combination of card draw and protection in combat, which Ive found particularly useful to allow Thopters to attack to trigger cards like Bident of Thassa
Mystical Tutor Sculpting the top of your deck is good and all, but Mystical Tutor just lets you get what you need
Mandibular Kite Huge pickup for Nahiri, serviceable in Akiri and other go-wide modified builds