Her ripple-style buff effect encourages you to have as many Angels as possible, and with vigilance, she can smack your opponent and still have a free extra White mana to throw out another Angel (which will then get stronger)
Cosima herself is a three mana Blue 2/4 that has a lot of text
That said, I did only talk about four of EDHREC's seven preview cards
Its Mind Games ability, which shut down your opponent's trainer cards on a coin flip, was intended to only work when Neo Slowking was your active Pokmon
That structure makes it easy to place three Lessons in the graveyard, unlocking the deck's true engine
Zero mana artifacts are prevalent in the likes of Modern and Legacy, with Mox Opal, Lotus Petal, and Mishras Bauble all seeing heavy play