Ozais Cruelty is a great addition to a deck full of hateful cards
Shepard, Winnie the Pooh is one of pop culture's most pervasive brands even without its ties to Disney
However, you won't be able to use fake Magic cards or proxies in competitive events, unless the event says otherwise for price-heavy formats like Vintage, where it's usually allowed to use some proxies to avoid damaging the original cards, as long as you own them
Which cards from The Brothers War are the best, and how might they perform
Other cards you might want to add include Robe of Stars, Meekstone, Retribution of the Meek, Ohran Frostfang, Ikra Shidiqi, the Usurper, Sylvan Caryatid, Utopia Tree, the surprisingly pricey Indomitable Ancients, Heroic Intervention, or Courser of Kruphix.