| Age | Category | Years | Body Length | Tail Length | HD | Damage Bonus | Breath Weapon | MR | AC | Strength | Fear Radius | Fear Save Modifier |
| 1 | Hatchling | 0 | 8-18 | 3-6 | 9 | +1 | 2d10+1 | 0 | -6 | |||
| 2 | Very Young | 6 | 18-30 | 6-12 | 11 | +2 | 4d10+2 | -1 | -5 | |||
| 3 | Young | 16 | 30-42 | 12-16 | 13 | +3 | 6d10+3 | -2 | -4 | |||
| 4 | Juvenile | 26 | 42-52 | 16-21 | 15 | +4 | 8d10+4 | -3 | -3 | |||
| 5 | Young Adult | 51 | 52-63 | 21-27 | 16 | +5 | 10d10+5 | 25% | -4 | -2 | 15 yards | +3 |
| 6 | Adult | 101 | 63-74 | 27-32 | 17 | +6 | 12d10+6 | 30% | -5 | -1 | 20 yards | +2 |
| 7 | Mature Adult | 201 | 74-85 | 32-37 | 18 | +7 | 14d10+7 | 35% | -6 | 0 | 25 yards | +1 |
| 8 | Old | 401 | 85-96 | 37-43 | 19 | +8 | 16d10+8 | 40% | -7 | +1 | 30 yards | 0 |
| 9 | Very Old | 601 | 96-108 | 43-48 | 20 | +9 | 18d10+9 | 45% | -8 | +2 | 35 yards | -1 |
| 10 | Venerable | 801 | 108-120 | 48-54 | 21 | +10 | 20d10+10 | 50% | -9 | +3 | 40 yards | -2 |
| 11 | Wyrm | 1001 | 120-134 | 54-60 | 22 | +11 | 22d10+11 | 55% | -10 | +4 | 45 yards | -3 |
| 12 | Great Wyrm | 1200+ | 134-148 | 60-67 | 23 | +12 | 24d10+12 | 60% | -11 | +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 | 250.000 | 12 | Lore (Age of the Great Dragons), Claw, Communicate (16%), Immune to cold, Polymorph Self (3/day), Cloud Walk | 7th | 4 | 3 | 8, 10, 9, 9, 11 | 7, 11, 10, 13, 12 | 13, 9, 11, 13, 10 | 16 | 18 | 1 | 1 | |
| 2 | 750.000 | 10 | 8th | 6 | 7, 9, 8, 8, 10 | 6, 10, 9, 12, 11 | 11, 7, 9, 11, 8 | 14 | 17 | 2 1 | 2 1 | |||
| 3 | 1.250.000 | 8 | Feather Fall (2/day) | 9th | 6 | 5, 7, 6, 5, 8 | 5, 9, 8, 11, 10 | 12 | 16 | 2 2 1 | 2 2 | |||
| 4 | 1.750.000 | 6 | Wall of Fog (1/day) | 2 | 10th | 9 | 4, 6, 5, 4, 7 | 2 2 2 1 | 3 2 1 | |||||
| 5 | 2.000.000 | 5 | 2 2 | 11th | 5, 8, 7, 10, 9 | 10, 5, 7, 9, 6 | 10 | 15 | 3 2 2 2 1 | 3 3 2 | ||||
| 6 | 2.250.000 | 4 | Control Winds (3/day) | 2 2 1 | 12th | 8 | 12 | 3, 5, 4, 4, 6 | 3 3 2 2 2 1 | 3 3 2 1 | ||||
| 7 | 2.500.000 | 3 | Control Weather (1/day) | 2 2 2 | 13th | 3 3 3 2 2 2 | 4 3 3 2 | |||||||
| 8 | 2.750.000 | 2 | Reverse Gravity (1/day) | 2 2 2 1 / 2 | 14th | 15 | 2, 6, 5, 8, 7 | 8 | 14 | 3 3 3 3 2 2 1 | 4 4 3 2 1 | |||
| 9 | 3.000.000 | 1 | 2 2 2 2 / 2 2 | 15th | 10 | 4 3 3 3 3 2 2 | 4 4 3 3 2 1 | |||||||
| 10 | 3.250.000 | 0 | 2 2 2 2 1 / 2 2 1 | 16th | 18 | 8, 3, 5, 7, 4 | 4 4 3 3 3 3 2 1 | 4 4 4 3 2 2 | ||||||
| 11 | 3.500.000 | -1 | 2 2 2 2 2 / 2 2 2 | 17th | 6 | 13 | 4 4 4 3 3 3 3 2 1 | 5 4 4 3 3 2 1 | ||||||
| 12 | 3.750.000 | -2 | 2 2 2 2 2 1 / 2 2 2 1 | 18th | 12 | 21 | 4 4 4 4 3 3 3 3 2 | 5 5 4 4 3 3 2 |