White Witch's Pearl Amulet

White Witch's Pearl Amulet enters the
battlefield tapped.
{t}: Add {w}.
Rainbow: (As long as one mono-color permanent of
each color is in play, the game has rainbow) Sacrifice
White Witch's Pearl Amulet: Search your library
for an Enchantment and reveal that card. Shuffle
your library, then put the card on top of it.
"It aids even an Apprentice, a worldly Enchantresses
can do much more."