Enter the first room to find two guards there, as well as multiple cracked walls. Kill the two enemies first with bombs, then blow up the wall on the left side as you enter, which leads farther into the mission (the other walls have nothing behind them). At the end of the path, throw a bomb to blow up the debris on the middle platform, then hover to the next path that leads into a room with The Grizz.
This room has a small puzzle to solve. If you look at the painting with your Binocucom, you'll see glowing spots. The same thing goes with the Grizz statue on the left side of the room. Look at the statue and notice the three shapes, which are a penguin, the medallion and an apple. Find the same three things on the painting and hit them with a dart, which will open up the door.
Blow up the debris on the middle platform, then hover to the other side of the room. Here, you'll need to use the alcoves in the wall to hide from the giant rolling eggs. Remember to not get greedy and just keep using the next alcove. When you get to the top, throw a bomb from the last alcove onto the cracked wall and blast it open.
In the next room, three of the guards (there are five in the room) are holding gems that will open the next door. Use your Binocucom to locate the three gems, which glow red when looking at the guards' pockets. Pickpocket them, then go to the door to open it up. You'll need to make it through another rolling egg gauntlet, this time with ice geysers. Some of the alcoves will be blocked by cracked walls, so use bombs. Across from the last one is a cracked wall that has a Secret Sly Mask.
The last room has The Grizz going back and forth. Once you gain control, you will have 60 seconds to hit him in the exposed part of his butt with three darts. After the first hit, there will be a big sheet of snow blocking some points of view. It will be the same with the third hit, but they will be in a different spot. The mission is over after the third dart connects.
