Bruna, the Light of Alabaster $50 EDH Deck Tech 

You can’t enchant her directly bur Bruna’s ability gets through shroud. So if you have greaves attached and attack with Bruna, trigger her ability, you can still attach auras to her this way

You’re not casting any of these auras, they’re put onto her from her ability for free. Even if she has shroud, hexproof or protection from all colors, her ability still kicks in and equips to her, any number of auras. You don’t target Bruna, her ability targets her, and protection from a color, doesn’t mean an aura attached to her drops off. She just can’t be targeted by that color. Remember DEBT for protection, can’t be dealt damaged, equipped, blocked or targeted by that source - Bruna’s ability stops me or anyone else from doing stuff to her but doesn’t stop her ability from allowing herself to equip stuff to her. Now this is for auras only, if I put greaves on her when she’s already got shroud, I can’t, because that’s a activated ability or a equip ability, on a targeted creature.