When it enters the battlefield, you create an x/x green tree-folk creature token
The way these charm style cards improve magic is nothing to do with reducing floods or screws but to do with their utility and how that allows you to improve your consistency
Quick Study is Instant-speed, but only looks at two cards
It also feels a little win-more. Turning your subsequent eldrazi and Ugins into mini Garruk, Apex Predators is cool, but by triggering this youre already casting amazing spells
That complexity will intimidate casual players, but it suits my tastes
The Nivs are especially centric to this category, where they actually are on flavor for either representing the guilds or some Izzet mechanic that was featured, Niv being the prior leader of the guild