Spectres

Spectres spawn while you're insane, i.e. the eye indicator is green.

• Phantom
• Spook
• Mirage
• Revenant
• Eidolon

Lunacy spectres

Lunacy spectres are the tougher cousins of spectres that will occasionally spawn while you're in lunacy, a state accessed through over-using sanity items.

• Sorrowhead
• Necromorph
• Siren
• Grinn
• Lockjaw

Other mobs

These mobs are added by Manic but aren't insanity-related in their spawning.

• Insomniac
• Piglin Monk
• Corpsecreep
• Zombee
• Heretic
• Zealot
• Flagellant
• Shadow Spook

Bosses

Bosses have special spawning conditions.

• The Keeper

Mini-bosses

Mini-bosses may spawn wandering around the world or in their own structures.

• Paracusia
• Malefactor (upcoming)
• Seer (upcoming)