John Dee — Royal Mathematician and Mirror Scholar
John Dee is a young English mathematician, astrologer, cartographer and occult scholar already convinced that numbers, navigation and spirit-contact describe the same hidden order. He is brilliant enough to be useful and ambitious enough to open doors wiser scholars left shut.
At a Glance
- Name: John Dee
- Species: Human
- Base: London and Oxford
- Role: Royal mathematician, astrologer, cartographer and occult scholar
- Alignment: Neutral
- Campaign status: Alive and active
- Campaign use: Arcane scholar, patron, dangerous researcher or expert on magical navigation
Game Statistics
5.5e / 2024
John Dee — CR 8 humanoid spellcaster; AC 15; HP 74; Int 20, Wis 16, Cha 15. Skills Arcana +11, History +9, Investigation +11, Nature +8.
Mathematical Casting. Dee has Advantage on Arcana checks involving circles, geometry, navigation or celestial timing.
Obsidian Mirror. Once per day Dee can perform a 10-minute ritual to ask one question of a distant or planar intelligence. The answer may be symbolic and the intelligence is not necessarily friendly.
Prepared Magic. Use an 8th-level wizard progression focused on divination, message, warding, illusion and planar contact.
John Dee — 5e / 2014
Medium humanoid (human), neutral
Armor Class 15 (mage armor); Hit Points 74; Speed 30 ft.; Challenge 5 (1,800 XP; proficiency bonus +3).
STR 9 (-1), DEX 14 (+2), CON 14 (+2), INT 20 (+5), WIS 16 (+3), CHA 15 (+2).
Saving Throws Int +8, Wis +6; Skills Arcana +11 (expertise), History +8, Investigation +11 (expertise), Nature +6; Senses passive Perception 13; Languages English, French, scholarly Latin, cipher systems.
Traits
Mathematical Casting. Dee has advantage on Intelligence (Arcana) checks involving mathematical diagrams, navigation, celestial timing and planar geometry.
Spellcasting. Dee is an 8th-level spellcaster using Intelligence (spell save DC 16; +8 to hit with spell attacks). He has four 1st-level, three 2nd-level, three 3rd-level and two 4th-level slots. Prepared spells: mage armor, shield, detect magic, identify (1st); detect thoughts, mirror image, see invisibility (2nd); counterspell, dispel magic, sending (3rd); arcane eye, dimension door, greater invisibility (4th). Cantrips: mage hand, minor illusion, ray of frost, prestidigitation.
Obsidian Mirror (1/Day). By conducting a ten-minute ritual before his prepared mirror, Dee contacts a distant or planar intelligence and asks one question. The answer may be symbolic, deceptive or incomplete; the mirror never guarantees truth and is not a free contact other plane spell.
Actions
Dagger. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 4 (1d4 + 2) piercing damage.
Ray of Frost. Ranged Spell Attack: +8 to hit, range 60 ft., one target. Hit: 9 (2d8) cold damage and the target’s speed is reduced by 10 feet until the start of Dee’s next turn.
Original 5e/2014 conversion. Dee’s encounter difficulty comes from wards, control spells and a prepared environment; the 2024 and older-edition blocks remain unchanged for later cross-edition balance review.
Pathfinder 1e
John Dee CR 8; human wizard 8. AC 19 with defensive magic; hp 58. Knowledge (arcana) +18, Knowledge (geography) +17, Linguistics +16, Spellcraft +18. Feats Scribe Scroll, Spell Focus (Divination), Skill Focus (Knowledge [arcana]).
D&D 3.5e
John Dee CR 8; human wizard 8. AC 18; hp 46. Scribe Scroll, Spell Focus (Divination), Skill Focus (Knowledge [arcana]).
What Is John Dee Doing Right Now?
Dee is trying to identify who is answering his obsidian mirror. The intelligence knows details about the forged-warrant investigation that Dee never told it, including a name Walsingham has deliberately kept out of written reports.
Meeting the NPC
Dee is energetic, courteous and eager to explain the elegant part of a theory before acknowledging the dangerous part. He asks adventurers for observations from places scholars rarely visit.
Encounters
- The mirror answers a question before Dee asks it.
- A navigation table predicts the party’s route through the city instead of a ship’s route at sea.
- Michael Scot sends Dee a warning that consists only of a corrected number.
Appearance and Manner
Lean, dark-haired and intense, Dee carries tablets, charts and measuring instruments everywhere. His rooms are crowded with books, wax tablets, compasses, star tables and the polished black mirror he watches too often.
Personality
Brilliant, sincere and dangerously curious. Dee genuinely wants knowledge to improve navigation and understanding, but he underestimates the possibility that something answering a question may have its own reason for answering.
Relationships
Michael Scot: older magical scholar whose warnings Dee respects even when he refuses to obey them. Francis Walsingham: values Dee’s ciphers and maps but distrusts uncontrolled spirit-contact. Oxford scholars: divided between admiration and alarm.
Equipment and Resources
- Obsidian scrying mirror
- Astrolabe, compasses and star tables
- Spellbooks and cipher notes
- Maps with experimental projection lines
- Protective chalks and warding cords
Running This NPC at the Table
Dee is an accelerator for magical investigation. He can interpret a pattern or open contact with something beyond ordinary reach, but the players should decide whether using the knowledge is wise.
Adventure Hooks
- The Voice in the Glass: Dee’s mirror names a person no one else knew was involved.
- Scot’s Correction: Michael Scot changes one number in Dee’s chart and refuses to explain why.
- The Impossible Coast: A map records a coastline that appears only under certain stars.
- The Listening Cipher: A coded letter changes after it is read aloud near the mirror.
Connected Places and People
Mythical and Historical Context
The historical John Dee was born in 1527 and died in 1608 or 1609. He could not have been a young scholar in 1454. This campaign’s John Dee is therefore an explicitly fictional forerunner carrying the mathematician’s name, mirror scholarship and interests into an earlier, magical England. His planar mirror and prepared spells are campaign inventions. The Dictionary of Welsh Biography covers the documented life, while the British Library manuscript catalogue records work by the historical Dee.
Rules Notes
The game statistics and campaign relationships are original adaptations for the stated rules editions.
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