Read the key
The current title puts Dungeons in the experience name. Update walkthroughs say keys drop from Normal, Hard, and Nightmare play, without a published percent. The key tooltip names the dungeon and any difficulty rule. Owning a key does not mean the current hero can clear that door. Check party size, items, and difficulty on the entrance panel, then stock the satchel and equip a pet in town first.
Blighted Slime
Creator walkthroughs connect Blighted Slime with Torment progression and treat it as a different item from the entry key. Do not spend it on the first door you see. If the farm is already ending your lives, go back to Act 1 honing, a better pet, and a full life bar. Fast Gold clips are filmed on established Torment ranks, not on a new Castle hero.
Modifiers
Elite Patrols, Volatile Enemies, Exhausting Battles, and Boss Rush are the named party modifiers. Inspect each one on the setup panel. Boss Rush is the one explicitly tied to lower currency, XP, and loot.
Secret bosses are mentioned across guides, including a trailer caption that names Mother Blight. Move lists and a 0.5% spawn figure appear on single pages and are not repeated here as a farm route. The in-game mob reference is the drop list to use for a named enemy.
Sigils, Tomes, Heartblood, and Heirlooms solve different goals. A class sigil does not evolve a race. Heartblood does not unlock Ultra.