Boss Difficulty Guide · Updated August 17, 2026
Every Mina the Hollower Boss Rated from 1 to 5 Stars
A consistent first-playthrough difficulty scale using the same verified boss-name and location baseline as our Boss Database and Boss Tier List.
Important: the boss names and locations below are factual reference data; the star ratings are editorial. Route order, weapon choice, Bone Up levels, Sidearms, Trinkets, and player strengths can move any encounter up or down.
Quick Answer: Hardest Bosses
Our current 5-star group is Mined Mind, Frozen Horror, The Congealed, Thalassion, Furgus the Faithful, Radiant Lionel, and Radiant Thorne. For a strict hardest-to-easiest order, use the Boss Tier List.
Full Boss Difficulty Table
| Boss | Rating | Type | Verified location |
|---|
| Mined Mind | ★★★★★ | Main / Generator | Bone Beach: Brain Alcove |
| Frozen Horror | ★★★★★ | Main | Coltrane Peak: Icebound Cavern |
| The Congealed | ★★★★★ | Main / Generator | Astral Orrery: Sealed Archive |
| Thalassion | ★★★★★ | Optional | Backwaters: Fishing Hole |
| Furgus the Faithful | ★★★★★ | Endgame | Radiant Manor: Servants' Quarters |
| Radiant Lionel | ★★★★★ | Endgame | Radiant Manor: Prime Generator |
| Radiant Thorne | ★★★★★ | Endgame | Ossex: City Center / Courtyard |
| Nox's Beast | ★★★★☆ | Main / Generator | Nox's Bayou: Tainted Lair |
| The Carving Man | ★★★★☆ | Main / Generator | Septemburg: Carving Shack |
| Locomotress Agnes | ★★★★☆ | Main | Coltrane Peak: Maelstrom |
| Dark Deluxy | ★★★★☆ | Optional | Septemburg: Windy Generator |
| Baron Lionel | ★★★★☆ | Endgame | Radiant Manor: Study |
| The Duchess of Queensbury | ★★★☆☆ | Main / Generator | Queensbury Crypt |
| Mock Moon | ★★★☆☆ | Boss | Nox's Bayou: Moonlit Path |
| Madd House | ★★★☆☆ | Boss | Kindlewood: Overgrowth |
| Major Miner | ★★★☆☆ | Boss | Sandfalls: Miner's Den |
| Lumenarks | ★★★☆☆ | Boss | Astral Orrery: Hall of Scholars |
| Armand | ★★★☆☆ | Optional | Ossex: Legovich's Arms |
| Midden | ★★★☆☆ | Optional | Queensbury Crypt: Ancestral Chamber |
| Mirren | ★★★☆☆ | Optional | Coltrane Peak: Frostbite Woods |
| Wonder Willis | ★★★☆☆ | Optional | Ossex: Music Hall |
| Maxi | ★★★☆☆ | Optional | Eastern Heath: Grassland |
| Evra the Undying | ★★★☆☆ | Optional | Goddred's Grave |
| The Dugin | ★★☆☆☆ | Optional | Ossex / Southern Outskirts / Western Wilds |
| Thorne | ★★☆☆☆ | Story | Ossex: Courtyard / Coltrane Peak: Fateful Cliff |
| Nether Kraken | ★★☆☆☆ | Opening | Tenebrous Sea |
★★★★★ Very Hard
- Mined Mind — One of the strongest first-clear execution checks in our editorial ranking. (Bone Beach: Brain Alcove)
- Frozen Horror — Late-region fight with little room for repeated mistakes. (Coltrane Peak: Icebound Cavern)
- The Congealed — A late-game wall that asks for consistent movement and resource control. (Astral Orrery: Sealed Archive)
- Thalassion — An optional encounter best approached after strong preparation. (Backwaters: Fishing Hole)
- Furgus the Faithful — A demanding late-game encounter in an already punishing stretch. (Radiant Manor: Servants' Quarters)
- Radiant Lionel — A major endgame confrontation tied to the Prime Generator. (Radiant Manor: Prime Generator)
- Radiant Thorne — A late-game version of a recurring rival encounter. (Ossex: City Center / Courtyard)
★★★★☆ Hard
- Nox's Beast — The Bayou's Spark Generator boss and a major movement-pressure fight. (Nox's Bayou: Tainted Lair)
- The Carving Man — A region-spanning pursuer that culminates in the Carving Shack fight. (Septemburg: Carving Shack)
- Locomotress Agnes — Movement-heavy pressure in one of the game's late regions. (Coltrane Peak: Maelstrom)
- Dark Deluxy — An optional encounter linked to the Windy Generator route. (Septemburg: Windy Generator)
- Baron Lionel — A late-game duel that rewards clean reads and disciplined punish windows. (Radiant Manor: Study)
★★★☆☆ Moderate
- The Duchess of Queensbury — The Spark Generator boss of Queensbury Crypt and a common first-region boss. (Queensbury Crypt)
- Mock Moon — A distinct Bayou encounter that becomes more manageable after its rhythm is learned. (Nox's Bayou: Moonlit Path)
- Madd House — A memorable Kindlewood encounter with a strong central gimmick. (Kindlewood: Overgrowth)
- Major Miner — A Sandfalls boss encountered in Miner's Den. (Sandfalls: Miner's Den)
- Lumenarks — A late-region Astral Orrery encounter. (Astral Orrery: Hall of Scholars)
- Armand — An optional Ossex encounter associated with Legovich's Arms. (Ossex: Legovich's Arms)
- Midden — A hidden Queensbury Crypt encounter. (Queensbury Crypt: Ancestral Chamber)
- Mirren — A Coltrane Peak optional encounter. (Coltrane Peak: Frostbite Woods)
- Wonder Willis — An optional Ossex encounter tied to the Music Hall. (Ossex: Music Hall)
- Maxi — An optional encounter in Eastern Heath. (Eastern Heath: Grassland)
- Evra the Undying — An optional fight at Goddred's Grave. (Goddred's Grave)
★★☆☆☆ Easier Once Understood
- The Dugin — A recurring optional encounter associated with the renegade route. (Ossex / Southern Outskirts / Western Wilds)
- Thorne — A recurring story boss whose difficulty changes across encounters. (Ossex: Courtyard / Coltrane Peak: Fateful Cliff)
- Nether Kraken — The opening sea encounter that sets up Mina's arrival on Tenebrous Isle. (Tenebrous Sea)