cards they havent invested mana in casting
As a general rule of thumb, a card with higher rarity will have more impactful in-game effects than one with a lower rarity
Wizards of the Coast has been going crazy with new, flashy foils
TheChirurgeon: It's hard for seven-mana walkers to deliver enough value to see play, but Chandra manages to avoid that, both because she can drop 8 damage and get some easy 3-for-1s the turn she hits the battlefield, and because her +1 ability is capable of creating immediate infinite combos with things like Felidar Guardian, The Peregrine Dynamo, and Combat Celebrant
One leading contender was a landfall theme to play up the battle for Gaia and its Lifestream, but that ended up feeling too ambiguous
The many cool colors used throughout the illustration give a sense of calmness and serenity that is very befitting of a monster as regal as Serperior