Gravepurge
Dragons of Tarkir — common
Instant
Gravepurge rulings:
2015-02-25: You can cast Gravepurge with no targets. If you do, you’ll just draw a card. However, if you cast it with at least one target and all of those targets become illegal, the spell won’t resolve and you won’t draw a card.
2011-01-22: You choose the order of the cards you put on top of your library.
2011-01-22: You can cast Gravepurge with zero targets. If you do, you’ll draw a card as the spell resolves.
2011-01-22: If you cast Gravepurge with at least one target and all of those targets become illegal, the spell won’t resolve and you won’t get to draw a card.