| Age | Category | Years | Body Length | Tail Length | HD | Damage Bonus | Breath Weapon | MR | AC | Strength | Fear Radius | Fear Save Modifier |
| 1 | Hatchling | 0 | 5-14 | 3-10 | 8 | +1 | 2d8+1 | +1 | -6 | |||
| 2 | Very Young | 6 | 14-23 | 10-19 | 10 | +2 | 4d8+2 | 0 | -5 | |||
| 3 | Young | 16 | 23-32 | 19-28 | 12 | +3 | 6d8+3 | -1 | -4 | |||
| 4 | Juvenile | 26 | 32-42 | 28-37 | 14 | +4 | 8d8+4 | -2 | -3 | |||
| 5 | Young Adult | 51 | 42-52 | 37-44 | 15 | +5 | 10d8+5 | 20% | -3 | -2 | 15 yards | +3 |
| 6 | Adult | 101 | 52-63 | 44-52 | 16 | +6 | 12d8+6 | 25% | -4 | -1 | 20 yards | +2 |
| 7 | Mature Adult | 201 | 63-74 | 52-60 | 17 | +7 | 14d8+7 | 30% | -5 | 0 | 25 yards | +1 |
| 8 | Old | 401 | 74-85 | 60-70 | 18 | +8 | 16d8+8 | 35% | -6 | +1 | 30 yards | 0 |
| 9 | Very Old | 601 | 85-96 | 70-80 | 19 | +9 | 18d8+9 | 40% | -7 | +2 | 35 yards | -1 |
| 10 | Venerable | 801 | 96-108 | 80-90 | 20 | +10 | 20d8+10 | 45% | -8 | +3 | 40 yards | -2 |
| 11 | Wyrm | 1001 | 108-120 | 90-100 | 21 | +11 | 22d8+11 | 50% | -9 | +4 | 45 yards | -3 |
| 12 | Great Wyrm | 1200+ | 120-134 | 100-110 | 22 | +12 | 24d8+12 | 55% | -10 | +5 | 50 yards | -4 |
| Level | Experience | THAC0 | Special Abilities | Spells | Casting Level | Weapon Proficiencies | Nonweapon Proficiencies | Saving Throws | Saving Throws (Priest) | Saving Throws (Mage) | THAC0 (Priest) | THAC0 (Mage) | Spells (Mage) | Spells (Priest) |
| 1 | 125.000 | 13 | Gaming, Claw, Communicate (16%), Immune to Electricity, Water Breathing, Speak with Animals | 9th | 4 | 3 | 10, 12, 11, 12, 13 | 7, 11, 10, 13, 12 | 13, 9, 11, 13, 10 | 16 | 18 | 1 | 1 | |
| 2 | 500.000 | 11 | 10th | 4 | 8, 10, 9, 9, 11 | 6, 10, 9, 12, 11 | 14 | 17 | 2 1 | 2 1 | ||||
| 3 | 1.000.000 | 9 | Create Food and Water (3/day), Polymorph Self (3/day) | 11th | 6 | 5 | 7, 9, 8, 8, 10 | 11, 7, 9, 11, 8 | 2 2 1 | 2 2 | ||||
| 4 | 1.500.000 | 7 | Wall of Fog (1/day) | 1 | 12th | 6 | 5, 7, 6, 5, 8 | 5, 9, 8, 11, 10 | 12 | 16 | 2 2 2 1 | 3 2 1 | ||
| 5 | 1.750.000 | 6 | 1 1 | 13th | 7 | 4, 6, 5, 4, 7 | 3 2 2 2 1 | 3 3 2 | ||||||
| 6 | 2.000.000 | 5 | ESP (3/day) | 2 1 | 14th | 8 | 8 | 5, 8, 7, 10, 9 | 10, 5, 7, 9, 6 | 10 | 15 | 3 3 2 2 2 1 | 3 3 2 1 | |
| 7 | 2.250.000 | 4 | Airy Water (3/day) | 2 2 | 15th | 9 | 3, 5, 4, 4, 6 | 3 3 3 2 2 2 | 4 3 3 2 | |||||
| 8 | 2.500.000 | 3 | 2 2 1 / 1 | 16th | 10 | 3 3 3 3 2 2 1 | 4 4 3 2 1 | |||||||
| 9 | 2.750.000 | 2 | Weather Summoning (1/day) | 2 2 2 / 1 1 | 17th | 10 | 11 | 2, 6, 5, 8, 7 | 8 | 14 | 4 3 3 3 3 2 2 | 4 4 3 3 2 1 | ||
| 10 | 3.000.000 | 1 | 2 2 2 1 / 2 1 | 18th | 12 | 4 4 3 3 3 3 2 1 | 4 4 4 3 2 2 | |||||||
| 11 | 3.250.000 | 0 | 2 2 2 2 / 2 2 | 19th | 13 | 8, 3, 5, 7, 4 | 4 4 4 3 3 3 3 2 1 | 5 4 4 3 3 2 1 | ||||||
| 12 | 3.500.000 | -1 | 2 2 2 2 1 / 2 2 1 | 20th | 12 | 14 | 6 | 13 | 4 4 4 4 3 3 3 3 2 | 5 5 4 4 3 3 2 |