CR 17+ fiend creatures from Monster Labs. These public stat blocks fit that band of the table; remix the CR or abilities if your party is ahead of the curve.
Hesmos
CR 30 · Fiend
Belphie
CR 30 · Fiend
伊戈罗纳克
CR 30 · Fiend
Xy'lothar, The Voidbringer
CR 30 · Fiend
Satan
CR 30 · Fiend
Asmodeus
CR 30 · Fiend
Apocalytron
CR 30 · Fiend
Sin of Odio
CR 30 · Fiend
Asmodeus
CR 30 · Fiend
The Void God
CR 30 · Fiend
Chaos Incarnate
CR 30 · Fiend
Mephistopheles
CR 26 · Fiend
The Demon Lord
CR 26 · Fiend
Varkon, The Demon Lord of Deceit
CR 26 · Fiend
Deus dos Cosmos
CR 25 · Fiend
Sauron
CR 25 · Fiend
Loviatar
CR 25 · Fiend
Erebos
CR 25 · Fiend
The Fallen Asmodean
CR 25 · Fiend
Satan
CR 25 · Fiend
Lom
CR 25 · Fiend
Corrupted Deity Spawn
CR 23 · Fiend