Will we ever see it again
Boardwipes: Doomskar, Extinction Event, Storms Wrath, etc
The Green one Leyline of Mutation lets you play your stuff with the alternate one mana of each color option, like Fist of Suns, and this cannot be played outside of that color combo in Commander
If I think that the expected value of a Mystery Booster WPN Edition booster pack is significantly higher than the retail price for said pack, I can just go out and buy as many boxes as I want and list the singles for sale on my storefront
Anyway, some of these cards are renowned for their importance in standard and larger formats, but I wanted to highlight a handful that you should grab now while theyre as cheap as they probably ever will be, for at least trying out in every single casual deck you want to play