The deck Blue White Auras has made an appearance early this year with the introduction of the components from Rivals of Ixalan, specifically Curious Obsession. With the arrival of Dominaria in the format, I checked on the possible additions and found two relevant cards as based on the current metagame: Danitha Capashen, Paragon, and Knight of Grace. Danitha is already a powerful 3-drop with the 3 abilities and also lessens your cost for the two-mana Auras. Knight of Grace was preferred over the Adorned Pouncer because of its evasion to popular spot removals like Fatal Push and Unlicensed Disintegration. That said, here below is my version of the DOM updated Blue White Auras:

Lands
4 Island
6 Plains
3 Shefet Dunes
3 Irrigated Farmland
4 Glacial Fortress

Creatures
3 Danitha Capashen, Paragon
4 Knight of Grace
3 Sacred Cat
3 Siren Stormtamer
4 Sram, Senior Edificer

Spells
1 Arcane Flight
2 Dive Down
4 Curious Obsession
3 Sheltering Light
3 Legion’s Landing/Adanto, the First Fort
4 Cartouche of Knowledge
4 Cartouche of Solidarity
2 One With the Wind