This is MY version of the steel dragon. It is not the published version. It is, however, surprisingly similar but with several major differences. I made this before I knew there was already a conversion in the LGG. I have NOT play tested it and I'm fairly confident the CR's are WAY off base and, to be honest, I'm not sure it's all that balanced, but... hey... here it is anyway
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Steel Dragon (Greyhawk Dragon)
Dragon (Earth)
Climate/Terrain: Temperate cities (rarely temperate hills, plains and forests)
Organization: Wyrmling, very young, young, juvenile and young adult: solitary or clutch (2-5); adult, mature adult, old, very old, ancient, wyrm, or great wyrm: solitary, pair or family (1-2 and 2-5 offspring)
Challenge Ratings: Wyrmling 1; very young 2; young 4; juvenile 6; young adult 8; adult 10; mature adult 12; old 15; very old 17; ancient 18; wyrm 19; great wyrm 21
Treasure: Double standard
Alignment: Always lawful neutral (good tendancies)
Advancement: Wyrmling 2-3 HD (Tiny); very young 5-6 HD (Tiny); young 8-9 HD (Small); juvenile 11-12 HD (Medium-size); young adult 14-15 HD (Medium-size); adult 17-18 HD (Large); mature adult 20-21 HD (Large); old 23-24 HD (Large); very old 26-27 HD (Huge); ancient 29-30 HD (Huge); wyrm 32-33 HD (Huge); great wyrm 35+ HD (Huge)
Combat
Breath Weapon (Su): A steel dragon has one type of breath weapon, a cloud of highly poisonous gas. The steel dragon has a high degree of control over the release of this gas which fills up to as many adjacent 5 ft. cubes as the dragons age category. All new cubes must be either ahead or to the side of another cube. This gas remains in the vicinity for 1d4 rounds, unless winds of moderate or higher strength are in effect in which case the wind dissipates after one round. Only creatures in the area of effect must make Fortitude saving throws against the listed DC as the poison loses potency very quickly. Therefore unlike normal poisons, there is no need to make a second saving throw one minute after the initial exposure. The initial damage is the listed dice amount of Constitution damage.
Spell-Like Abilities: 5/day–polymorph self; at will–prestidigitation; 3/day–eagle's splendor; 1/day–charm person, suggestion, mass charm, mass suggestion. A steel dragon's polymorph self works just like the spell, except that each use allows only one change, which lasts until the dragon assumes another form or reverts to its own (which does not count as a use of this ability).
Skills: A steel dragon has the Bluff, Diplomacy, Knowledge (all skills taken individually) and Perform skills for free at 1 rank per Hit Die.
Steel Dragons by Age
Attack Fort Ref Will Breath Fear
Age Size Hit Dice (hp) AC Bonus Save Save Save Weapon (DC) DC SR
Wyrmling T 1d12+1 (13) 16 (+2 size, +4 natural) +3 +3 +2 +4 1d3 (11) – 14
Very young T 4d12+4 (30) 19 (+2 size, +7 natural) +8 +5 +4 +6 2d3 (12) – 16
Young S 7d12+7 (52) 21 (+1 size, +10 natural) +10 +7 +5 +8 3d3 (14) – 18
Juvenile M 10d12+20 (85) 23 (+13 natural) +13 +9 +7 +11 4d3 (15) – 20
Young adult M 13d12+26 (110) 26 (+16 natural) +17 +11 +8 +12 5d3 (16) 14 22
Adult L 16d12+48 (152) 28 (-1 size, +19 natural) +21 +14 +10 +15 6d3 (18) 17 24
Mature adult L 19d12+76 (199) 31 (-1 size, +22 natural) +24 +16 +11 +16 7d3 (19) 19 26
Old L 22d12+110 (253) 34 (-1 size, +25 natural) +29 +18 +13 +19 8d3 (20) 21 28
Very old H 25d12+125 (287) 36 (-2 size, +28 natural) +32 +20 +14 +21 9d3 (22) 23 30
Ancient H 28d12+168 (350) 39 (-2 size, +31 natural) +36 +22 +16 +24 10d3 (23) 25 32
Wyrm H 31d12+186 (387) 42 (-2 size, +34 natural) +40 +24 +17 +26 11d3 (24) 27 34
Great wyrm H 34d12+238 (459) 45 (-2 size, +37 natural) +44 +27 +19 +29 12d3 (26) 30 36
Age Speed Str Dex Con Int Wis Cha Special Abilities Caster Level
Wyrmling 60 ft., fly 200 ft. 11 10 13 14 15 14 Poison immunity,
(good), burrow 30 ft. polymorph self
Very young 60 ft., fly 200 ft. 13 10 13 16 15 14 Prestidigitation
(good), burrow 30 ft.
Young 60 ft., fly 200 ft. 15 10 15 16 17 16 Comprehend Languages 1st
(good), burrow 30 ft.
Juvenile 60 ft., fly 200 ft. 17 10 15 18 19 18 Charm person 3rd
(good), burrow 30 ft.
Young adult 60 ft., fly 250 ft. 19 10 17 18 19 18 Damage reduction 5/+1 5th
(average), burrow 30 ft.
Adult 60 ft., fly 250 ft. 23 10 19 20 21 20 Eagle's splendor 7th
(average), burrow 30 ft.
Mature adult 60 ft., fly 250 ft. 25 10 21 20 21 20 Damage reduction 10/+1 9th
(average), burrow 30 ft.
Old 60 ft., fly 250 ft. 27 10 21 24 23 22 Suggestion 11th
(average), burrow 30 ft.
Very old 60 ft., fly 300 ft. 29 10 23 26 25 24 Damage reduction 15/+2 13th
(poor), burrow 30 ft.
Ancient 60 ft., fly 300 ft. 31 10 23 28 27 26 Mass charm 15th
(poor), burrow 30 ft.
Wyrm 60 ft., fly 300 ft. 33 10 25 30 29 28 Damage reduction 20/+3 17th
(poor), burrow 30 ft.
Great wyrm 60 ft., fly 300 ft. 35 10 27 32 31 30 Mass suggestion 19th
(poor), burrow 30 ft.