I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "The story focuses on series protagonist Link, who tries to prevent Hyrule from being engulfed by a corrupted parallel dimension known as the Twilight Realm. To do so, he takes the form of both a Hylian and a wolf, and is assisted by a mysterious creature named Midna. The game takes place hundreds of years after Ocarina of Time and Majora's Mask, in an alternate timeline from The Wind Waker."? 

What animal comes to his aid?