The frostbloom is a magic flower found in tundra keep chests or dug up by sniffers there. It forms snow layers around it, freezes water -> ice -> packed ice -> blue ice, fills cauldrons with powdered snow, turns lava into magma, and puts out fire.
It also damages blazes, magma cubes, and striders and heals snow golems. When bone-mealed, it drops frostbloom petals and will speed up the freezing process of blocks around it.
The room in the tundra keep that the frostbloom is found in.