Jahadra, Ocean's Majesty

You may look at the top card of your library.
(You may do this at any time.)
At the beginning of each upkeep, put all cards exiled with Jahadra in your graveyard, then exile the top card of your library with Jahadra. You
may cast cards exiled with Jahadra, and you may
do this any time you could cast an instant.