This angel and Dominaria's Lyra Dawnbringer make up an excellent couple. Think of it as an Angelic Accord attached to a pretty solid body, and all that is only for three mana.
As for Modern, then Soul Sisters and Trostani archetypes will benefit greatly from this undercosted angel. In any case, the initial price already speaks for itself, so there is no need to mention how powerful this card actually is.
The Standard will most likely see it in control decks that use white mana, or in mono-white angel tribal decks with Shalai, Voice of Plenty.