As an aside for those players who immediately wonder, "When is Modern coming?", let me offer the preemptive answer of, "Modern currently isn't on our roadmap, and we don't have plans to add it any time soon." Card Sets Beyond this year, of course we'll deliver each major card set next year
Once per turn: You can target 1 monster your opponent controls
Or using a Summoned Skull to look at your life points
Why Should One Collect Cards
Or in Purphoros, Bronze-Blooded, a 5cmc commander full of expensive creatures, a 3cmc ramp card that taps for 2+ mana like Worn Powerstone is ideal because it lets you cast your commander two(!) turns early and start sneaking out your haymakers
While there are 5 or more cards in your opponent's graveyard, you can activate this effect: This card's level becomes 4, until the end phase