Nissa, Vastwood Seer is my personal fave, a Civic Wayfinder that transforms into a sweet card advantage engine with admittedly lackluster minus abilities
I'm using the word "play" loosely here, as often times it doesn't feel like playing Magic , since you aren't exactly drawing cards or casting spells like a normal deck
For example, if the opponent is searching their library for a basic land card, you can't have them find a different card, such as a creature card
You now have a chance to not attack and still poison your opponent
Magic Legends card list & price guide
They cost four mana, can be played for free turn one with an opening hand grip, and then typically are good solid value for four later, but rarely broken