While specific patch notes for every sub-version vary, the v1.0.4 series generally focuses on:
Fixing "BadHttpJson" errors and other networking bugs related to the rescue system. Mad.Crown.v1.0.4.8004.rar
Features procedurally generated dungeons, inventory management, survival elements, and significant penalties for player death. While specific patch notes for every sub-version vary,
Adjustments to monster mechanics and item drop rates in late-game areas like the "Gods Graveyard" or "Nightmare Mirage". Mad.Crown.v1.0.4.8004.rar
If your party falls, you can share a rescue code with other players. Other adventurers can enter your "corpse" location to retrieve your lost items. Version v1.0.4.8004 Highlights