Converting prehistoric creatures

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Since we've wrapped up the "bears", lets tackle Titanoboa.

This isn't a conversion, per se, but we can easily tie it to any of the giant snakes.

By its listed size, it should start at Gargantuan, and probably advance to Colossal.

We can probably upsize the giant constrictor snake and make some modifications. The dire snake probably won't work, as it combines traits of vipers with constrictors.

Here's a giant constrictor snake upsized to Gargantuan and 25 HD (the mid-range of its usual Gargantuan advancement)....


Snake, Giant Constrictor
Gargantuan Animal
Hit Dice: 25d8+75 (187 hp)
Initiative: +3
Speed: 20 ft. (4 squares), climb 20 ft., swim 20 ft.
Armor Class: 17 (–4 size, +3 Dex, +8 natural), touch 9, flat-footed 14
Base Attack/Grapple: +18/+41
Attack: Bite +25 melee (2d6+16)
Full Attack: Bite +25 melee (2d6+16)
Space/Reach: 20 ft./15 ft.
Special Attacks: Constrict 2d6+16, improved grab
Special Qualities: Scent
Saves: Fort +17, Ref +17, Will +9
Abilities: Str 33, Dex 17, Con 17, Int 1, Wis 12, Cha 2
Skills: 28 (giant constrictor has 8 ranks in Hide, 2 ranks in Climb, Listen and Spot, and 1 in Swim)
Feats: 9 (2 can be epic)[giant constrictor has Alertness, Endurance, Skill Focus (Hide), Toughness]
Environment: Warm forests
Organization: Solitary
Challenge Rating: 9
Treasure: None
Alignment: Always neutral
Advancement: 26–33 HD (Gargantuan); 34+ (Colossal)
Level Adjustment: —

Constrict (Ex): On a successful grapple check, a titanoboa deals 2d6+16 points of damage.

Improved Grab (Ex): To use this ability, a titanoboa must hit with its bite attack. It can then attempt to start a grapple as a free action without provoking an attack of opportunity. If it wins the grapple check, it establishes a hold and can constrict.

Skills: Snakes have a +4 racial bonus on Hide, Listen, and Spot checks and a +8 racial bonus on Balance and Climb checks. A snake can always choose to take 10 on a Climb check, even if rushed or threatened. Snakes use either their Strength modifier or Dexterity modifier for Climb checks, whichever is higher. A snake has a +8 racial bonus on any Swim check to perform some special action or avoid a hazard. It can always choose to take 10 on a Swim check, even if distracted or endangered. It can use the run action while swimming, provided it swims in a straight line.
 
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Fixed it.

Hmmm...no core feats to improve constriction, but nothing says we can't give it a bit of a damage boost if we'd like.

I definitely want to get rid of Toughness. What a worthless filler feat.
 


Toughness...yick.
If anything I have two non-core feats that might be useful.

I found a feat called Strong Coils in Dragon 313 that improves constrict damage by one step.
Also I'm quite fond of the Improved Toughness feat, and so are the people on the WotC prehistoric creatures thread I frequent. I forget which book that is in, but it requires a +2 base Fort save and improves hit points by +1 per Hit Die.
 

I like those two feats (especially Improved Toughness), but we try to stick to stuff in the SRD since we have such high visibility (due to the association with ENWorld).

We wouldn't want to get a "cease-and-desist" after all this time!

We can occasionally "fudge" a bit and turn portions of non-SRD feats into special abilities and the like, though.
 

OK, so no Improved Toughness. We could give it Epic Toughness, however.

Feats: Alertness, Cleave, Endurance, Power Attack, Skill Focus (hide), Stealthy, Weapon Focus (bite)

Epic Feats: Epic Prowess, Epic Toughness

Since it's so huge, we may want to consider giving it swallow whole.
 

Added to Homebrews.

I'm fine with swallow whole. Here's the similarly-sized purple worm's writeup...

Swallow Whole (Ex): A purple worm can try to swallow a grabbed opponent of a smaller size than itself by making a successful grapple check. Once inside, the opponent takes 2d8+12 points of crushing damage plus 8 points of acid damage per round from the worm’s gizzard. A swallowed creature can cut its way out by using a light slashing or piercing weapon to deal 25 points of damage to the gizzard (AC 17). Once the creature exits, muscular action closes the hole; another swallowed opponent must cut its own way out. A Gargantuan worm’s interior can hold 2 Large, 8 Medium, 32 Small, 128 Tiny, or 512 Diminutive or smaller opponents.

Do those amounts (other than the AC) work here?

Speaking of AC, suggested boost to natural armor?
 


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