Archangel Raiden

Flash Flying Vigilance
You may cast Angel spells as though they
had flash.
When Archangel Raiden or another angel enters
the battlefield under your control if it was cast
reveal cards from the top of your library equal to
the amount of many spent to cast it. You may
cast any number of Auras revealed this way
without paying their mana cost, then put the rest
on the bottom of your library in a random order.