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
You now have a chance to not attack and still poison your opponent
Realistically, youve got two different avenues to go down, and either one has a lot of potential
Nissa, Vastwood Seer is my personal fave, a Civic Wayfinder that transforms into a sweet card advantage engine with admittedly lackluster minus abilities
This highlights the importance of including some decent green card draw in your decks
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