Catacombs Fiend

Are These Foe Or Food?!? Fiend Folio: The Catacombs

The CREEPIEST Isaac Boss EVER! Cacophobia (Fiend Folio)

There Are 3 Secret Floors In Fiend Folio!

The Secret Boss Badges In Fiend Folio Explained!

All NEW Beggars In Fiend Folio Explained!

The Sleeper's Scary Domain! Fiend Folio: The Depths

All NEW Pickups In Fiend Folio Explained!

These Enemies Use Items! Fiend Folio: The Caves

The Basement - FULL Fiend Folio Enemy Showcase!

Holy Crap! All NEW Poops In Fiend Folio!

Catacomb

Black Water Fiend

The Cellar - FULL Fiend Folio Enemy Showcase!

Forgor Family Meeting!!! 💀 Fiend Folio: The Necropolis

the overlooked [catacombs]

Cool NEW Item Pool Discs!!! (Fiend Folio)

The Most Advanced Floor! Fiend Folio: The Mines

They Seeeee Youuu!!! 👀 Fiend Folio: The Mausoleum

Which Tainted Isaac Characters Could I beat in a Fight?