Tan-Tai, Rules Archmage

Flash, Menace, Hexproof
Whenever Tan-Tai attacks, look at the top 5 cards of your library. You may exile a non-land card & put the rest to the bottom of your library in any order. Until your next turn you may cast the exiled card as though it had Flash.
You may look at the top card of your library. You may cast that card if as if it had flash, if it is a non-creature spell with CMC 3 or less