If you do, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle your library
You may not be able to literally select which cards are going to the graveyard with each discard spell, but by paying attention to what cards your opponent keeps and what they give up, you can try and time your punches to cut off their decisions and paralyze even the most powerful Constructed decks
Pay X energy counters, Sacrifice a creature, return Chthonian Nightmare to its owner's hand: Return target creature card with mana value X from your graveyard to the battlefield
Magic: The Gathering is a card game thats been around for a long, long time
There's only one problemdid I mention he's a Goblin
Brothers Yamazaki allowed you to have two of the same legendary creatures in play at the same time