UBR is a grindy control deck with Fable of the Mirror-Breaker and Indomitable Creativity as its big payoffs, so Negate is excellent against their Indomitable Creativity, Fable of the Mirror-Breaker, Fires of Victory, or The Theorist, Jace Beleren. Abrade kills Fable's Goblin Shaman token or the transformed Fable creature before it copies something scary, and also answers Mirrex's Mite tokens. Winternight Stories is too slow against their counterspell-heavy suite (Make Disappear, Negate), so it comes out. Get Out stays in because it counters Fable of the Mirror-Breaker (an enchantment spell) as well as their expensive creature bombs like Raph & Mikey, Atraxa, and Valgavoth.