This is the key protection Aerial event that will allow you to trigger Angel’s draw in the villain phase. You should obviously plan on exhausting an ally to use this, as if you exhaust your hero you could have just defended or recovered for about the same amount of damage prevented and not wasted a card. Outside of Angel’s pack, some of the best Aerial allies you might want to pick up are Starhawk, Vivian, or Snowguard. For heroes besides Angel, it’s still ok, but it’s awkward that it’s not a defense, which many protection decks would prefer, and without those synergies stunning and ally blocking is usually a better way to protect your hero.