Type:	Dragon (Cold)'''
Environment:	Temperate mountains
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 Rating:	Wyrmling 4; very young 5; young 7; juvenile 10; young adult 13; adult 15; mature adult 18; old 20; very old 21; ancient 23; wyrm 24; great wyrm 26
Treasure:	Triple standard
Alignment:	Always lawful good
Advancement:	Wyrmling 8?9 HD; very young 11?12 HD; young 14?15 HD; juvenile 17?18 HD; young adult 20?21 HD; adult 23?24 HD; mature adult 26?27 HD; old 29?30 HD; very old 32?33 HD; ancient 35?36 HD; wyrm 38?39 HD; great wyrm 41+ HD
Level Adjustment:	Wyrmling +4; very young +4; young +5; others ?

Silver Dragons by Age

Age	Size	Hit Dice (hp)	Str	Dex	Con	Int	Wis	Cha	Base Attack/ Grapple	Attack	Fort Save	Ref Save	Will Save	Breath Weapon (DC)	Frightful Presence DC
Wyrmling	S	7d12+7 (52)	13	10	13	14	15	14	+7/+4	+9	+6	+5	+7	2d8 (14)	?
Very young		M (10d12+20)	85	15	10	15	14	15	14/+10	+12	+12	+9	+7	+9 (4d8)	17
Young	M	13d12+26 (110)	17	10	15	16	17	16	+13/+16	+16	+10	+8	+11	6d8 (18)	?
Juvenile		L (16d12+48)	152	19	10	17	18	19	18/+16	+24	+19	+13	+10	+14 (8d8)	21
Young adult	L	19d12+76 (199)	23	10	19	18	19	18	+19/+29	+24	+15	+11	+15	10d8 (23)	23
Adult		H (22d12+110)	253	27	10	21	20	21	20/+22	+38	+28	+18	+13	+18 (12d8)	26
Mature adult	H	25d12+125 (287)	29	10	21	20	21	20	+25/+42	+32	+19	+14	+19	14d8 (27)	27
Old		H (28d12+168)	350	31	10	23	22	23	22/+28	+46	+36	+22	+16	+22 (16d8)	30
Very old	H	31d12+186 (387)	33	10	23	24	25	24	+31/+50	+40	+23	+17	+24	18d8 (31)	32
Ancient		G (34d12+238)	459	35	10	25	26	27	26/+34	+58	+42	+26	+19	+27 (20d8)	34
Wyrm	G	37d12+333 (573)	39	10	29	28	29	28	+37/+63	+47	+29	+20	+29	22d8 (37)	37
Great wyrm		C (40d12+400)	660	43	10	31	30	31	30/+40	+72	+48	+32	+22	+32 (24d8)	40

[/indent]

Silver Dragon Abilities by Age

Age	Speed	Initiative	AC	Special Abilities	Caster Level	SR
Wyrmling	40 ft., fly 100 ft. (average)	+0	17 (+1 size, +6 natural), touch 11, flat-footed 17	Alternate form, immunity to acid and cold, cloudwalking, vulnerability to fire	?	?
Very young		40 ft., fly 150 ft. (poor)	+0, touch 19 (+9 natural), flat-footed 10	19:	?
Young	40 ft., fly 150 ft. (poor)	+0	22 (+12 natural), touch 10, flat-footed 22		1st	?
Juvenile		40 ft., fly 150 ft. (poor)	+0, touch 24 (?1 size, +15 natural), flat-footed 9	24	Feather fall	3rd
Young adult	40 ft., fly 150 ft. (poor)	+0	27 (?1 size, +18 natural), touch 9, flat-footed 27	DR 5/magic	5th	20
Adult		40 ft., fly 150 ft. (poor)	+0, touch 29 (?2 size, +21 natural), flat-footed 8	29	Fog cloud	7th
Mature adult	40 ft., fly 150 ft. (poor)	+0	32 (?2 size, +24 natural), touch 8, flat-footed 32	DR 10/magic	9th	24
Old		40 ft., fly 150 ft. (poor)	+0, touch 35 (?2 size, +27 natural), flat-footed 8	35	Control winds	11th
Very old	40 ft., fly 150 ft. (poor)	+0	38 (?2 size, +30 natural), touch 8, flat-footed 38	DR 15/magic	13th	27
Ancient		40 ft., fly 200 ft. (clumsy)	+0, touch 39 (?4 size, +33 natural), flat-footed 6	39	Control weather	15th
Wyrm	40 ft., fly 200 ft. (clumsy)	+0	42 (?4 size, +36 natural), touch 6, flat-footed 42	DR 20/magic	17th	30
Great wyrm		40 ft., fly 200 ft. (clumsy)	+0, touch 41 (?8 size, +39 natural), flat-footed 2	41	Reverse gravity	19th

*Can also cast cleric spells and those from the Air, Good, Law, and Sun domains as arcane spells.
A silver wyrmling?s scales are blue-gray with silver highlights. As the dragon approaches adulthood, its color gradually brightens until the individual scales are scarcely visible.

Silver dragons are not violent and avoid combat except when faced with highly evil or aggressive foes. If necessary, they use fog cloud or control weather to blind or confuse opponents before attacking. When angry, they use reverse gravity to fling enemies helplessly into the air, where they can be snatched. Against flying opponents, a silver dragon hides in clouds (creating some with control weather on clear days), then jumps to the attack when it has the advantage.
Breath Weapon (Su): A silver dragon has two types of breath weapon, a cone of cold and a cone of paralyzing gas. Creatures within a cone of paralyzing gas must succeed on a Fortutude save or be paralyzed for 1d6 rounds plus 1 round per age category of the dragon.
Alternate Form (Su): A silver dragon can assume any animal or humanoid form of Medium size or smaller as a standard action three times per day. This ability functions as a polymorph spell cast on itself at its caster level, except that the dragon does not regain hit points for changing form and can only assume the form of an anirmal or humanoid. The dragon can remain in its animal or humanoid form until it chooses to assume a new one or return to its natural form.
Cloudwalking (Su): A silver dragon can tread on clouds or fog as though on solid ground. The ability functions continuously but can be negated or resumed at will.
Spell-Like Abilities: 3/day?fog cloud (adult or older), control winds (old or older); 2/day?feather fall (juvenile or older); 1/day? control weather (ancient or older), reverse gravity (great wyrm).
Skills: Bluff, Disguise, and Jump are considered class skills for silver dragons.
See Wikipedia Entry: http://en.wikipedia.org/wiki/Dragon

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System Reference Document -> List of Creatures (SRD)