If your opponent discards a card while you control Leyline of the Void, abilities that check whether a card is discarded (such as Hollow One, or a madness ability of the discarded card) still work, even though that card never reaches that player's graveyard
It really helps that the reward of Marchesa, Resolute Monarch has one of the rarest effects in all of Magic in being able to remove all counters from a permanent
SCG has no NM or SP copies listed, and wants $180 for their MP copies
The Eldrazi was also printed through the Modern Masters 2015 set
We can only wonder how many would-be commanders become Esper, Grixis, or Sultai at the last minute
As I was peeling off basic lands and proxies alternatively, I couldn't tell any difference in the feel of the cards