WUBG relies on Oath of Druids to cheat creatures into play and Sphere of Resistance to tax your spells, so the extra Annul is useful against Oath of Druids itself or Mox Diamond. Exalted Angel is a strong flying threat that dodges their ground manlands (Treetop Village, Mishra's Factory) and gains life to offset their Terravore damage race. Trim some countermagic since Sphere of Resistance makes your counters harder to hold up profitably. Keep Swords to Plowshares and Wrath of God as premium answers to anything Oath of Druids puts into play.