When Fortune enters,
scryTo “scry N” means to look at the top N cards of your library, then put any number of them on the bottom of your library in any order and the rest on top of your library in any order.
If a player is instructed to scry 0, no scry event occurs. Abilities that trigger whenever a player scries won’t trigger.
If multiple players scry at once, each of those players looks at the top cards of their library at the same time. Those players decide in APNAP order (see rule 101.4) where to put those cards, then those cards move at the same time.
An ability that triggers whenever a player scries triggers after the process described in rule 701.22a is complete, even if some or all of those actions were impossible. (CR 701.22) 2.
Whenever Fortune attacks while saddled, at end of combat,
exileTo exile an object, move it to the exile zone from wherever it is. See rule 406, “Exile.” (CR 701.13) it and up to one creature that saddled it this turn, then return those cards to the battlefield under their owner's control.
SaddleSaddle is an activated ability. “Saddle N” means “Tap any number of other untapped creatures you control with total power N or greater: This permanent becomes saddled until end of turn. Activate only as a sorcery.”
Saddled is a designation that has no rules meaning other than to act as a marker that spells and abilities can identify. Only permanents can be or become saddled. Once a permanent has become saddled, it stays saddled until the end of the turn or it leaves the battlefield. Being saddled is not a part of the permanent’s copiable values.
A creature “saddles” a permanent as it’s tapped to pay the cost to activate a permanent’s saddle ability. (CR 702.171) 1