McFarlane's Dragon

I decided on a whim to stat out the McFarlane Dragons. To start with, here is the Komodo Clan:

Komodo Clan Dragon CR 20;Gargantuan Dragon (Earth); HD 28d12+140 (Dragon); hp 325; Init +3; Spd Fly, Poor 200, 60, Climb 40; AC 19; Atk +36 base melee, +27 base ranged; +36/+31/+31/+31 (4d6+12, Bite; 2d8+6, 2 Claws; 2d8+6, Tail slap; 2d6+6, 2 Wings); SA: Breath weapon (Su), Frightful presence (Ex), Snatch (Ex), Rend (Ex); SQ: Damage reduction (Su), Low-light vision (Ex); AL CE; SV Fort +21, Ref +19, Will +18; STR 35, DEX 16, CON 20, INT 6, WIS 15, CHA 6.
Skills:
Appraise+34, Balance+34, Climb+53, Spot+21.
Feats:
Endurance, Flyby Attack, Hover, Power Attack, Run, Toughness, Track, Wingover.
Komodo Clan Dragons are swift runners and climbers. They tend to be fierce and tenacious hunters with ravenous appetites ... man-eaters. They live in burrows and caves, and may be the cause of earthquakes.*


*quoted from spawn.com
Special Abilities
Earthquake(SA): Komodo Clan Dragons can use the spell Earthquake once per day as a spell like ability. Caster Level 17th.
Breath Weapon (Su) 60 ft. line. 15d8 electricity, Reflex DC23 half
Frightful Presence (Ex): 300ft radius,, HD 28 or fewer, Will DC 26 negates
Snatch (Ex): Against Medium or smaller creatures, bite for 4d6+12/round or claw for 2d8+6 per round
Damage Reduction(Ex) 5/-

Climate: any underground
Langauge: Draconic


So, is it any good? Should I stat out the rest of them?

I like the idea (I'd been planning on merely using them for existing dragon types, but this fits better). My one critique is that the CR seems like it's a little too high for the dragon as described. Other than that, good job

I was basing the stats off a CR 21 blue dragon. Though I cut its breath weapon damage in half, lowered the DC for frightful presense, and dropped spellcasting, I added earthquake and DR. Still, 19 or 18 might be better...does anyone with more expierence then I want to help?

I will try and post another dragon by the end of the week.