Olga, Nahiri's Disciple

{u}{t}: Scry 1, then put the top card of your library
into your graveyard.
Delirium - At the beginning of your upkeep, if
there are four or more card types among cards in
your graveyard, exile Olga, then return her to the
battlefield transformed under her owner's control.
I shall finish what you started Lady Nahiri