Zor is the fifth boss of Sonic Lost World, serving as the recurring boss of Silent Forest.
After his first confrontation with Sonic, Zor retreats to Silent Forest Zone 2, where he will use his owl mech to try and catch Sonic. Should the hedgehog be caught by the searchlights, he will be carried off by shadow bats, constituting instant death. Throughout the Zone, the player must use stealth to avoid the searchlights until they reach the end of the Zone, where Zor will resort to fighting Sonic.
Zor will use the owl mech to fire capsule-like missiles that circle around the arena as they slowly descend. Should one of them reach the ground, it will split open and send a harmful electrical spark that will crawl along the ground of the arena. The player must wait for the missiles to descend low enough, then perform a Flying Kick on one of them to send it back to Zor, knocking him off and allowing the player to attack him. He will then repeat his attack, firing more missiles and requiring more missiles to be grounded. After enough hits, Zor will be forced to retreat.
This battle is repeated in Nightmare Zone, with Zor's owl mech being replaced by the second-level Nightmaren Jackle. To defeat Zor, Sonic must use the Homing Attack or Flying Kick to send three of Jackle's cards at him.
Seeing Sonic run through the ruins of Silent Forest, Zor challenges him in a dark temple room at the end of Zone 4. Once encountered, Zor will summon his shadow bats to fuse together and create two shadow clones to aid him. The lights will go out, and all three will then start flying around the arena, leaving the player to figure out which Zor is the real one and attack him, and so long as the lights stay out, all three Zors will look identical. To reveal which is the real Zor, the player has to pull down a light switch, exposing the real Zor. They must be quick, as Zor and his shadow clones will ricochet off the blocks that make up the floor and make less standing room for the player, leading to death via bottomless pit. It only takes a few hits to defeat Zor, and a fully-charged Homing Attack will take him down in one hit.
Zor goes for one more round against Sonic at the end of the second tier of Lava Mountain Zone 3. The player does not attack Zor directly, but must instead flee from him by climbing the tower as he jumps from platform to platform to attack them with energy blasts. At the top of the tower are two switches on both sides of the arena, and the player must pull either one of them down to destroy the platforms, dropping Zor into a hot bath and putting an end to his miserable ways.