Colossal+ is fun!
If we're keeping Int 5, it has to be a magical beast. So that's my vote.
We should definitely give it bigger space/reach, and I also certainly agree to increasing Str and Con. Did you have thoughts on that?
Agreed. Magical Beast it is then.
We should definitely give it bigger space/reach, and I also certainly agree to increasing Str and Con. Did you have thoughts on that?
I'd go whole hog and honour the original's 150-yard long tentacles with a Reach of 750 ft. with tentacles.
The beastie's body is "over 150′ long" so I fancy a hefty 150 ft. Space. Now the SRD Giant Squid has a body "more than 20 feet long" and has a 15 ft. Space so it
could have a 120 ft. Space but that seems a bit small in proportion to the tentacle reach. Even 150 feet is one-fifth the tentacle reach, which is a ratio significantly higher than the standard giant cephalopods - the Giant Octopus and Giant Squid are both 2:1 (10 ft. vs. 20 ft. tentacle reach or 15 ft. vs. 30 ft.), while the Kraken is 3:1 (20 ft. vs. 60 ft.).
Actually… I'd be game making the Space larger than 150 ft. if you prefer. A 3:1 ratio like the Kraken's would give a 250 ft. Space.
Anyhow, for the sake of argument I'll proceed with a Space/Reach of 150 ft./50 ft. (750 ft. with tentacle).
Now the Mystaran Kraken has a Space 7.5 times wider than a Kraken. That suggests its roughly the equivalent of three "size categories" bigger (or eight times wide) since the dimensions double with each size increase.
Normal size advancement for three size categories is +24 Str and +12 Con, which would make it Str 58, Con 41 if applied to the Kraken's Str 34, Con 29.
However, its tentacles 12.5 longer than a regular Kraken so it may be more like 3½ size-doublings, giving it Str 62, Con 42.
Compared to a Giant Octopus, it's 15 times wider and has tentacles 32.5 longer, suggesting either four to five "dimension doublings" for somewhere between +32 Str, +16 Con and +40 Str, +20 Con to the Giant Octopus's Str 20, Con 13, resulting in Str 52-60, Con 29-33.
A Giant Squid is inbetween, being 10 times wider with tentacles 25 times longer is something like 3¼ to 4½ "doublings". Let's call it as between +26 Str, +13 Con and +36 Str, +18 Con to the Giant Squid's Str 26, Con 13, resulting in Str 52-62, Con 26-31.
I'm inclined to be conservative and go for the lowest figures in that range and make it Str 52-53, Con 30-31.
Dexterity 13 like a Gargantuan+ Giant Squid seems appropriate.
Intelligence 5 has already been decided.
For Charisma and Wisdom how about averaging a Kraken's 20 with a Giant Squid/Octopus's Wis 12, Cha 3 or 2?
That'd be Wisdom 16, Charisma 11-12.
Put together that's Str 52, Dex 13, Con 31, Int 5, Wis 16, Cha 12
I think I'll start a Working Draft.