Giant Snowman

Giant Snowman (雪ダルマン, Yuki Daruman) was a Mysterious Being that arises from a mountain.

Appearance
Giant Snowman is an extremely large monster, the size of a mountain. It's appearance is of a typical snowman with dark arms, small pointy nose and thick eyebrows.

200 Yen
The monster appears in the mountains, as Saitama was carrying a child on his shoulder.

Trivia

 * It is by far the largest monster in the series.
 * Another Giant Snowman roughly the same size makes an appearance in the opening of the anime, but under a rather different aspect, bearing little resemblance to the "typical snowman".
 * We never see Saitama fight with this monster, it can just be supposed that it ends "one-punched" like the others (the "one-punched" snowman on the image after is human-sized and does not look threatening at all).