Some ideas for ice caves

caves under mountains, icebergs or tundra biomes that are full of snow. Potentially a variant of dripstone that is frozen and deals frost damage for 5 seconds. Perhaps a variant biome with icicles and ice spawning like dripstone and dripstone blocks. Make strays spawn here and give them a Potential to spawn with mining fatigue arrows. Increase skeleton spawner rates in these biomes to make the threat real. Make it a good place to get calcite as that would look good near the snow that would be down here.