Ages of Dragons  hit dice

Bite is d10 per size level, claw is d6 per size level, tail is d8 per size level, wing attack is 2d4 per size level; referring to after it gets that option.

Armour class of the dragon does not include magical items or spells that it might have or use.

Spells as a sorcerer of level (hit dice -8), with extra slots equal to charisma and any spell category if it matches their colour motif

Wrymling               9d8 medium +9 proficiency modifier +2

HP 50.  BW 7d6 (25)

Damage modifier +1

bite 1d10

AC 16.               CR3

Sorcerer level 1   Spell save DC 11; spell attack modifier +3

Juvenile                11d8 medium +22 proficiency modifier +2

HP 72.  BW 9d6(32)

Damage modifier +2

bite 1d10

AC 16.                 CR4

Sorcerer level 3   Spell save DC 12; spell attack modifier +4

Young Dragon.  14d10 large +42 proficiency modifier +2

HP 119.   BW 12d6(42)

Damage modifier +3, multi attack bite, claw, claw

bite 2d10, claw 1d6

AC 17.                CR7

Sorcerer level 6.  Spell save DC 13; spell attack modifier +5

Adult.                    17d10 large  +68 proficiency modifier +3

HP 162.   BW 15d6(53)

Damage modifier +4, multi attack bite, claw, claw

bite 2d10, claw 1d6

AC 17.          CR8

Sorcerer level 9.  Spell save DC 15; spell attack modifier +7

Mature.                20d10 large. +100 proficiency modifier +4

HP 210.  BW 18d6(63)

Damage modifier +5, multi attack bite, claw, claw

bite 2d10, claw 1d6

AC 18.              CR11

Sorcerer level 12.  Spell save DC 17; spell attack modifier +9

Old.                       23d12 huge. +138 proficiency modifier +5

HP 288.  BW 21d6(74)

Damage modifier +6, multi attack bite, claw, claw

bite 3d10, claw 2d6, wing buffet 2d4

AC 18.                CR16

Sorcerer level 15.   Spell save DC 19; spell attack modifier +11

Venerable.          26d12 huge. + 182 proficiency modifier +6

HP 332.  BW 24d6(84)

Damage modifier +7, multi attack bite, claw, claw

bite 3d10, claw 2d6, wing buffet 2d4

AC 19.                      CR 19

Sorcerer level 18.  Spell save DC 21; spell attack modifier +13

Ancient.              29d12 huge + 232 proficiency modifier +7

421.  BW 27d6(95)

Damage modifier +8, multi attack bite, claw, claw

bite 3d10, claw 2d6, wing buffet 2d4

AC 19.                      CR 21

Sorcerer level 20.   Spell save DC 23; spell attack modifier +15

Grants cleric level 1 spells

Wyrm.                  32d20 gargantuan +288 proficiency modifier +8

624.  BW 30d6(105)

Damage modifier +9, multi attack bite, claw, claw

bite 4d10, claw 3d6, wing buffet 4d4

AC 20.                       CR26
Sorcerer level 20.   Spell save DC 25; spell attack modifier +17

Grants upto level 4 cleric spells

Great Wyrm.     40d20 gargantuan +400 proficiency modifier +9

820.   BW 38d6(133)

Damage modifier +9, multi attack bite, claw, claw

bite 4d10, claw 3d6, wing buffet 4d4

AC 21.                     CR28

Sorcerer level 20.   Spell save DC 27; spell attack modifier +19

Grants spells as a God, including Domains

Grand Wyrm.    45d20 gargantuan+ 450 proficiency modifier +10

923.  BW 43d6(151)

Damage modifier +10, multi attack bite, claw, claw

bite 4d10, claw 3d6, wing buffet 4d4

AC 22.                        CR30

Sorcerer level 20.    Spell save DC 29; spell attack modifier +21

Grants spells as a God, including Domains

As soon as they gain spell abilities they gain the speech and sentience.  They gain the ability to speak multiple languages at large sized and above.  They also begin recruiting followers at large size.  At huge size they begin to create minions, by taking allies or prisoners they can mold them into creatures of their own design.  By the time they reach Gargantuan size they count their minions as hosts, armies in the thousands, additionally they can grant their worshiper's prayers.  They have clerics and those clerics have domains