Aya, Master Spellbinder

Flying
{t}: Target Angel creature you control gains hexproof and vigilance until end of turn.
{w}{u}{b}{r}{g}: Reveal the top three cards of your library, you may cast an Angel creature card revealed this way without paying it's mana cost. Place the remaining cards on the bottom of your library in any order.
If two cards have been cast in this way flip Aya, Master Spellbinder at the end of your turn.