Powerbalance checks off all the relevant boxes for me: its a callback to an awesome card from years past, it forces interaction (in other words, makes me have to pay attention to the game), it gives you free stuff, and it allows for fun top-deck manipulation
To anchor our discussion in practical Cube design, I use a thought experiment: if we assign a supercomputer 1 a set of design goals and restrictions, and then ask it to rank every possible Cube (i.e., every possible combination of 360 Magic cards 2 ) by power level tiers, it would look something like this: There are about 10 ways to combine the ~21,000 extant Magic cards into a 360 cube more possibilities than there are atoms in the universe, by a lot
She is known for only making promises she can keep, though her honesty can at times backfire as she will not hold her tongue or her sword when wronged
Possession Engine
Older foils, in particular, can be surprisingly expensive because they can be significantly rarer than modern foils