Domain Zoo is a fast, wide aggro deck with Wild Nacatl, Territorial Kavu, and Nishoba Brawler backed by Leyline Binding and Leyline of the Guildpact, so you need to stabilize against a go-wide board and answer their enchantment-based removal engines. Wrath of the Skies can wipe their small aggressive creatures and their Leyline Binding/Leyline of the Guildpact enchantments for a scaled energy cost, making it excellent one-sided value against their curve-out plan. Obsidian Charmaw's flying body helps race and block, and its enter-the-battlefield trigger destroys a nonbasic land, disrupting their five-color domain manabase that leans on nonbasic lands like Indatha Triome and shocklands. Chthonian Nightmare and Thraben Charm are too slow and narrow against this aggressive matchup, so they come out for sweeper effects and land disruption.