| Age | Category | Years | Body Length | Tail Length | HD | Damage Bonus | Breath Weapon | MR | AC | Strength | Fear Radius | Fear Save Modifier |
| 1 | Hatchling | 0 | 3-8 | 2-6 | 7 | +1 | 2d6+1 | +2 | -6 | |||
| 2 | Very Young | 6 | 8-16 | 6-12 | 9 | +2 | 4d6+2 | +1 | -5 | |||
| 3 | Young | 16 | 16-27 | 12-20 | 11 | +3 | 6d6+3 | 0 | -4 | |||
| 4 | Juvenile | 26 | 27-38 | 20-30 | 13 | +4 | 8d6+4 | -1 | -3 | |||
| 5 | Young Adult | 51 | 38-50 | 30-40 | 14 | +5 | 10d6+5 | 10% | -2 | -2 | 15 yards | +3 |
| 6 | Adult | 101 | 50-59 | 40-50 | 15 | +6 | 12d6+6 | 15% | -3 | -1 | 20 yards | +2 |
| 7 | Mature Adult | 201 | 59-73 | 50-60 | 16 | +7 | 14d6+7 | 20% | -4 | 0 | 25 yards | +1 |
| 8 | Old | 401 | 73-86 | 60-70 | 17 | +8 | 16d6+8 | 25% | -5 | +1 | 30 yards | 0 |
| 9 | Very Old | 601 | 86-100 | 70-80 | 18 | +9 | 18d6+9 | 30% | -6 | +2 | 35 yards | -1 |
| 10 | Venerable | 801 | 100-114 | 80-90 | 19 | +10 | 20d6+10 | 35% | -7 | +3 | 40 yards | -2 |
| 11 | Wyrm | 1001 | 114-130 | 90-100 | 20 | +11 | 22d6+11 | 40% | -8 | +4 | 45 yards | -3 |
| 12 | Great Wyrm | 1200+ | 130-147 | 100-110 | 21 | +12 | 24d6+12 | 45% | -9 | +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 | 64.000 | 14 | Tease, Claw, Communicate (14%), Jumping, Immune to Acid, Spider Climb (Stone Surfaces) | 8th | 5 | 3 | 10, 12, 11, 12, 13 | 7, 11, 10, 13, 12 | 13, 9, 11, 13, 10 | 16 | 18 | 1 | 1 | |
| 2 | 250.000 | 12 | 9th | 4 | 8, 10, 9, 9, 11 | 2 1 | 2 1 | |||||||
| 3 | 750.000 | 10 | Neutralize Poison (3/day) | 10th | 7 | 5 | 7, 9, 8, 8, 10 | 6, 10, 9, 12, 11 | 11, 7, 9, 11, 8 | 14 | 17 | 2 2 1 | 2 2 | |
| 4 | 1.250.000 | 8 | Stone Shape (2/day) | 1 | 11th | 6 | 5, 7, 6, 5, 8 | 5, 9, 8, 11, 10 | 12 | 16 | 2 2 2 1 | 3 2 1 | ||
| 5 | 1.500.000 | 7 | 2 | 12th | 7 | 3 2 2 2 1 | 3 3 2 | |||||||
| 6 | 1.750.000 | 6 | Forget (1/day) | 3 | 13th | 9 | 8 | 4, 6, 5, 4, 7 | 3 3 2 2 2 1 | 3 3 2 1 | ||||
| 7 | 2.000.000 | 5 | Rock to Mud (1/day) | 3 1 | 14th | 9 | 5, 8, 7, 10, 9 | 10, 5, 7, 9, 6 | 10 | 15 | 3 3 3 2 2 2 | 4 3 3 2 | ||
| 8 | 2.250.000 | 4 | Move Earth (1/day) | 3 2 / 1 | 15th | 10 | 3, 5, 4, 4, 6 | 3 3 3 3 2 2 1 | 4 4 3 2 1 | |||||
| 9 | 2.500.000 | 3 | 3 3 / 2 | 16th | 11 | 11 | 4 3 3 3 3 2 2 | 4 4 3 3 2 1 | ||||||
| 10 | 2.750.000 | 2 | 3 3 1 / 3 | 17th | 12 | 2, 6, 5, 8, 7 | 8 | 14 | 4 4 3 3 3 3 2 1 | 4 4 4 3 2 2 | ||||
| 11 | 3.000.000 | 1 | 3 3 2 / 3 2 | 18th | 13 | 4 4 4 3 3 3 3 2 1 | 5 4 4 3 3 2 1 | |||||||
| 12 | 3.250.000 | 0 | Wall of Stone (1/day) | 3 3 2 1 / 3 3 | 19th | 13 | 14 | 8, 3, 5, 7, 4 | 4 4 4 4 3 3 3 3 2 | 5 5 4 4 3 3 2 |