There are many important moments in the story, but the most crucial—called "story spotlights"—are shown on cards. These cards have the Planeswalker symbol in their text box; this symbol has no effect on gameplay. You can read more about these events in the official Magic fiction at http://www.mtgstory.com.
If a permanent has {X} in its mana cost, X is considered to be 0.
If the target permanent is an illegal target by the time Perilous Voyage resolves, the entire spell doesn't resolve. You won't scry.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Wesley Burt
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
Use the permanent's mana value as it existed on the battlefield to determine whether you scry.
