How Dungeon Trials Play

A dungeon's rooms are fought in order, then comes the boss room. Fighting rooms have 9 to 12 spawn points and boss rooms 6 to 10. Every room except the boss room has one sealed exit.
Sealed doors are filled with Trial Seal blocks: red, glowing (light level 9), see-through and unbreakable, with amethyst sounds. Nothing can spawn on them and they can't be pushed. A doorway is typically 3 blocks wide and 4 tall.
Room 1's goons appear as soon as the party arrives (the arrival point is inside room 1).
Every other room's goons appear the first time any party member steps inside that room. A red action-bar message says "Room <n> of <total>: the enemies wake", with a raid horn.
When a room's goons are all dead, its exit seals dissolve in red glowing particles with an amethyst-break sound, and a green message says "Room cleared: the seal breaks."
After the last room you see "The trial's master stirs..."
The boss appears the first time a party member steps into the boss room.
The "Room n of total" count is the number of rooms before the boss room.