Structure idea: Frozen Castle

I voted for the Iceologer in 2020 mob vote, however, I'm starting to think that this mob should have a structure to spawn in instead of just spawning in a biome. Seeing how in Minecraft Dungeons how most Illagers spawning in a castle, and how they own their own castle, I think a castle structure would fit the theme of the Iceologer. The idea would be a castle in ruins that is located in the mountains, with powdered snow littering some rooms, and strays patrolling lower floors, and dungeons filled with zombies, vindicators, Iceologers, and zombified piglins found in a portal room with a ruined portal filled with only crying obsidian a lava leaking from the portal.