Ice Golems look like Iron Golems but throw an ice shard at their enemies. They are really brittle giving them super low health and melt in any biome that isn't cold.
The only biomes ice golems cannot melt in are the snowy tundra, ice spikes, snowy taiga, snowy taiga mountains, snowy beach, frozen river, frozen ocean, and the deep frozen oceans. Unlike snow golems, ice golems will also melt in medium and cold temperatures as they can only live in freezing temperatures.
Ice golems will be made with compressed ice put into a similar pattern as an iron golem with a slight change. The pattern will consist of 1 compressed ice on the bottom, on top is a pumpkin, then to the right and left of the pumpkin there will be 2 more ice.
The Ice golem will look like a hunched over iron golem missing its head. The head will be a pumpkin like the snow golem and will be halfway inside of the torso with the arms possible 3/4 of the size of the iron golems. The legs will be the same size as an iron golem's legs but shorter to make it still 2 blocks tall.
Overall, the golem will be 2 blocks tall and 3 wide. It will throw small ice shards at enemies doing a little bit of damage but not as much to make it overpowered. I'm not sure if you got the same picture as I did in my head when I tried describing it but I can probably make a picture if I have to. This is just meant to be a combination of the Ice and Iron Golems.