After the Lakebed Temple, Link appears in Lanayru's fountain right next to Zant. Zant uses some sort of magical attack against the light spirit, and Twilight returns to the area for a moment. Link returns to his Wolf Form, and Zant implants a Twilight splinter into the mark on Wolf Link's forehead, preventing him from turning back into his human form. He also steals the Fused Shadows from Midna and attacks her, leaving her weakened. Link has to go to Zelda to cure Midna, and then retrieve the Master Sword to remove the Twilight splinter, which then allows him to shift into and out of Wolf Form at will.