You've got fantastic removal with Swords to Plowshares and Mortify , plenty of board wipes with Hour of Reckoning, Fell the Mighty, and Martial Coup , and even some decent lands like Sunken Hollow, Praierie Stream, and Exotic Orchard
For now, though, think of like this: You have inevitability if your deck is powerful enough that you'll win a very high portion of games that go long
If were going to see more locations, having a character with 5 Strength is super beneficial, and it can sing every song in the deck
If you really wanted to cover all the bases, you could add 9 more cards that, according to my research, are rarely but occasionally played competitively these days: Arrogant Wurm, Beetleback Chief, Bottle Gnomes, Fyndhorn Elves, Order of Leitbur, Order of the Ebon Hand, Portent, Shield Sphere, and Whispers of the Muse