The wrinkle here, of course, is that pesky increase in MSRP
Instead of paying the full mana cost, you could put a lot of cards in your graveyard (which many competitive decks tend to do) and pay the minimal cost for each of them
Perhaps the best of these is Scavenger Regent, a well-costed board wipe attached to a well-costed creature
6.6%inclusion 6%synergy 1.12K decks 16.9K decks Scorpion's Sting 6.3%inclusion 6%synergy 1.07K decks 16.9K decks Sorceries Blasphemous Act 36%inclusion -9%synergy 6.01K decks 16.9K decks Reanimate 35%inclusion 10%synergy 5.91K decks 16.9K decks Will of the Jeskai 29%inclusion 27%synergy 4.92K decks 16.9K decks Careful Study 25%inclusion 23%synergy 4.27K decks 16.9K decks Behold the Sinister Six
Rares in this slot upgrade to mythics at a rate of approximately 1:5
CMC: 5 Legality: Commander: Legal Duel: Banned Gladiator: Legal Historic: Banned Historicbrawl: Legal Legacy: Legal Modern: Legal Premodern: Legal Vintage: Legal Rulings: 2004-10-04 If multiple extra turn effects resolve in the same turn, take them in the reverse of the order that the effects resolved