When Fortune, Loyal Steed enters the battlefield,
scry 2
(Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.).
Whenever Fortune attacks while saddled, at end of combat, exile it and up to one creature that saddled it this turn, then return those cards to the battlefield under their owner's control.
Saddle 1
(Tap any number of other creatures you control with total power 1 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)