Twilit Ice Mass: Blizzeta is the fifth dungeon boss that appears in The Legend of Zelda: Twilight Princess in Snowpeak Ruins. She is actually Yeta who at first helps Link retrieve the shard of the Mirror of Twilight but when she looks into the shard, the dark powers of the fragment turn her into an evil creature that can control ice.
Yeta will guide Link to the bedroom. Upon looking in the mirror shard, Yeta turns into an evil creature. She will create a huge icy shell around her to protect her. During the first phase of the battle, Blizzeta will slide around the room trying to bump into Link. Link has to use his Ball and Chain to break off pieces of her shell. After dealing a couple of hits with the Ball and Chain, Blizzeta will scatter Mini Freezards across the room. The next phase Blizzeta will change her icy shell, making it with arms. She will float above the room dropping icicles down onto Link. Link can only dodge these by looking at the reflections on the icy floors. Link can destroy one or two by using the ball and chain. Blizzeta wil then drop the icicles down forming a barrier around Link. She will then fall in the center of the barrier. Link must get out of the barrier and strike her with the Ball and Chain when she lands. Doing this a couple of more times her shell will shatter and she will be turned back to normal through the sunshine from the window. The next mirror shard is then recovered.