The radiant dragon is a sinuous, serpentine dragon with graceful, translucent wings. Its scales are a collection of glittering pearl-like shards of mica and gypsum, which cause the dragon's scales to shimmer in the starlight, giving the creature its name.
    The radiant dragons make their lair in an asteroid that is hollowed out. They are normally solitary and very territorial about their “turf,” which can include up to the space surrounding a planet or moon. These dragons created some hollow asteroids that are now used by certain human civilizations. A selfish and hungry radiant dragon can easily descend on an asteroid citadel and clean out all other living things (particularly if it considers the asteroid its “own” from an earlier stage of life).

    Combat: Actions of a radiant dragon depend on the situation and the individual. They rarely flee from a flight, however, depending on their huge size to keep them safe from opponents. A radiant dragon will concentrate on the ship itself first, seeking to first destroy or eliminate any serious threats (such as ballistas and catapults). Of equal importance is elimination of the mages and any with magical powers.
    If the radiant dragon is aligned toward good, he will seek to neutralize them with silence, 15' radius spells (if available). If less concerned about killing, he will merely slay hostile wizards as he finds them.
    As a general rule, radiant dragons will give a ship and crew the opportunity to leave, parley, or generally bow and scrape and beg for its kindness and mercy. Even the smallest of these creatures has an overweening sense of pride.

    Breath Weapon (Su): The radiant dragon breath weapon produces glowing pulses of force that resemble very large magic missiles. They can breath a single pulse of the listed damage, or any number of smaller pulses in the same round, provided that no pulse inflicts less than 2d12 points of damage. A juvenile dragon can breathe a single pulse of 8d12 points, or four pulses of 2d12 each or two pulses of 4d12 each. Each pulse can strike a separate target. The pulses are unerring in their attacks, and will hit unless the victim makes a successful Reflex Save (DC listed on the table below). If the victim fails the save, it will be struck for the listed damage. If the victim makes the save, it has dodged that pulse, which then evaporates.
    The radiant dragon can use its breath weapon on physical objects (such as a ship) as well.

    Constriction (Ex): Radiant dragon of Huge size or larger can with it coids of its tail deals crush damage with a successful grapple check agianst creatures one size category smaller then itself each and every round. The dragon can make other attacks, and even attack other ships while squeezing another ship or creature.

    Improved Grab (Ex): To use this ability, the radiant dragon of huge size or greater must hit an opponent one-size category smaller than itself with its tail attack. If it gets a hold, it can then constrict its opponent.

    Other Spell-Like Abilities: 3/day — shapechange, 1/day — freshen air, foul air, interposing claw (functions just like bigby's interposing hand except that instead of a hand it looks like a hugh dragon claw), grasping claw (functions just like bigby's grasping hand except that instead of a hand it looks like a hugh dragon claw), wall of force, forcecage, and prismatic sphere. A radiant dragon's shapechange works just like the spell, except that each use allows only one change, which lasts until the dragon assumes another from or reverts to its own (which does not count as a use of this ability).

    Spelljamming Ability (Su): When not within 3,750 feet of 10-ton ship/object or within an atmosphere, Radiant dragons of juvenile age category or older have the innate ability to spelljam across great distances of wildspace. When not moving at spelljamming speed the Radiant dragon moves either by flight or slithering across the ground. As natural spelljammers they have on occasion towed wrecked ships (in return for a promise of reward, or a statue in their name at least), maximum tonnage it can tow is 3 tons for those radiant dragons of huge size, 25 tons for those of gargantuan size, and 200 tons for those of colossal size.

Radiant Dragons by Age

				Attack	Fort	Reflex	Will	Breath	Fear
Age	Size	Hit Dice (hp)	AC	Bonus	Save	Save	Save	Weapon (DC)	DC	SR
Wyrmling	M	9d12+27 (86)	18 (+8 natural)	+13	+9	+6	+9	2d12 (17)	—	—
Very Young	L	12d12+48 (126)	20 (–1 size, +11 natural)	+17	+12	+8	+12	4d12 (20)	—	—
Young	L	15d12+60 (158)	23 (–1 size, +14 natural)	+22	+13	+9	+13	6d12 (21)	—	—
Juvenile	L	18d12+90 (207)	26 (–1 size, +17 natural)	+27	+16	+11	+16	8d12 (24)	—	—
Young Adult	H	21d12+126 (263)	28 (–2 size, +20 natural)	+30	+18	+12	+17	10d12 (26)	25	21
Adult	H	24d12+144 (300)	31 (–2 size, +23 natural)	+34	+20	+14	+20	12d12 (28)	28	23
Mature Adult	H	27d12+189 (365)	34 (–2 size, +26 natural)	+38	+22	+15	+21	14d12 (30)	29	25
Old	G	30d12+240 (435)	35 (–4 size, +29 natural)	+41	+25	+17	+25	16d12 (33)	33	27
Very Old	G	33d12+297 (512)	38 (–4 size, +32 natural)	+45	+27	+18	+27	18d12 (35)	35	28
Ancient	G	36d12+360 (594)	41 (–4 size, +35 natural)	+49	+30	+20	+30	20d12 (38)	38	30
Wyrm	C	39d12+429 (683)	40 (–8 size, +38 natural)	+49	+32	+21	+32	22d12 (40)	40	31
Great Wyrm	C	42d12+504 (777)	43 (–8 size, +41 natural)	+53	+35	+23	+35	24d12 (43)	43	33

Radiant Dragons Abilities by Age

									Caster
Age	Speed	Str	Dex	Con	Int	Wis	Cha	Special Abilities	Level*
Wyrmling	30 ft, fly 300 ft (poor)	19	10	17	16	17	16		—
Very Young	30 ft, fly 300 ft (poor)	23	10	19	18	19	18	Spelljamming Ability	1
Young	30 ft, fly 300 ft (poor)	27	10	19	18	19	18	Freshen air, foul air	3
Juvenile	30 ft, fly 300 ft (poor)	31	10	21	20	21	20	Interposing claw	5
Young Adult	30 ft, fly 300 ft (poor)	33	10	23	20	21	20	Damage reduction 5/+1	7
Adult	30 ft, fly 300 ft (clumsy)	35	10	23	22	23	22	Shapechange, grasping claw	9
Mature Adult	30 ft, fly 300 ft (clumsy)	37	10	25	22	23	22	Damage reduction 10/+1	11
Old	30 ft, fly 300 ft (clumsy)	41	10	27	26	27	26	Wall of force	13
Very Old	30 ft, fly 300 ft (clumsy)	43	10	29	28	29	28	Damage reduction 15/+2	15
Ancient	30 ft, fly 300 ft (clumsy)	45	10	31	30	31	30	Forcecage	17
Wyrm	30 ft, fly 300 ft (clumsy)	47	10	33	32	33	32	Damage reduction 20/+3	19
Great Wyrm	30 ft, fly 300 ft (clumsy)	49	10	35	34	35	34	Prismatic sphere	21

* Can also cast cleric spells and that of the Mind Prestige Domain as arcane spells.

In The Spheres
    Mature adult radiant dragons do mingle among mere mortals, often taking the face and the role of an adventurer or hero as the dragon passes through the asteroid citadels. A character that is faced with unpaid bills for services from places he has never visited may guess that his renown is great enough to earn him the mimicry of a radiant dragon. In some regions this is considered a great honor (once it is confirmed by detect lie or other divination spells). In other areas of space it is considered a blasted nuisance.

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Dragon, Radiant, SPELLJAMMER, DUNGEONS & DRAGONS, D&D, ADVANCED DUNGEONS & DRAGONS, AD&D, the D&D logo, the AD&D logo, the d20 System logo and d20 are trademarks owned by Wizards of the Coast, Inc., a subsidiary of Hasbro, Inc., and are used with permission. All titles, and all proper nouns, including character names, locations, and named items are considered Product Identity per Section 1 of the Open Game License v1.0a and are exclusively owned by Wizards of the Coast, Inc.
©2002 Wizards of the Coast, Inc.

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Dragon, Radiant, © 1989 Wizards of the Coast, Inc.
d20™ System, Conversion of Dragon, Radiant ©2002, Mark Doolan
Original Source: Lorebook of the Void

    Notes on this Conversion: As with the stellar dragon the big challenge was the "charts" by age category. Otherwise this is a straight forward conversion.
    Artwork by Paul Jaquays. Used without permission. All rights reserved. This piece of work comes from the cover of Dungeon Magazine #36, it shows "Lich's Tear" the primary of Pirtel Space, the radiant dragon Blacklight coming out of a space leviathan which he makes his lair.