| Two of Skulls | Above the eastern save room (Castle Keep). |
| Three of Skulls | Top of the stairs, in the north room (Royal Chapel). |
| Four of Skulls | Rare drop from Axe Knight (Marble Gallery). |
| Five of Skulls | Rare drop from Sniper of Goth (Royal Chapel). |
| Six of Skulls | Rare drop from Medusa Head (Outer Wall). |
| Seven of Skulls | Room above Richter (Castle Keep, requires Goggles). |
| Eight of Skulls | Rare drop from Flea Armor (Long Library). |
| Nine of Skulls | Rare drop from Black Crow (Clock Tower). |
| Ten of Skulls | Above the clock, to the left (Marble Gallery, requires Soul of Bat). |
| Jack of Skulls | Solo room to the southeast of the eastern save room (Castle Enterance, requires Leap Stone). |
| Queen of Skulls | Room to the right of Succubus (Underground Cavern). |
| King of Skulls | Second room behind Galamoth (Underground Cavern). |
| Ace of Skulls | Rare drop from Dodo bird (Castle Entrance). |
