Apply a Withered Tentacle as a tail on your (Skeleton Type)

Wiki note: The title of this option varies with its number of tails and fins and Menace quality:
Apply a Withered Tentacle as a Tail on your

Skeleton: Tails	Text
0	Tailless
1	Single-tailed
2	Twin-tailed
3	Triple-tailed

Skeleton: Fins	Text
0	Finless
1	Single-finned
2	Double-finned
3	Triple-finned
4	Quadruple-finned
5	Five-finned
6	Six-finned
7	Seven-finned
8	Eight-finned
9	Nine-finned
10	Ten-finned

Skeleton: Menace	Text
0	Creature
1	Animal
2	Beast
3	Monster
4	Monstrosity
5	Demon
6+	Abomination

A player-created Guide is available for this content: Assembling a Skeleton (Guide)

How are the above links here?

ID: 242510

Spoiler warning! This page contains details about Fallen London Actions.

From: Assemble a Skeleton

Inaccurate, but it would fill the empty spot.

Game Instructions: This will add a nominal amount to the value of your skeleton and reduce its Antiquity by 1.

Unlocked with 1 x Withered Tentacle, Skeleton: Tails Needed

Locked with Skeleton: Skulls Needed

Challenge information

Narrow, Monstrous Anatomy 4 (50% base)

• 0 - almost impossible (10%)
• 1 - high-risk (20%)
• 2 - high-risk (30%)
• 3 - tough (40%)
• 4 - very chancy (50%)
• 5 - chancy (60%)
• 6 - modest (70%)
• 7 - very modest (80%)
• 8 - low-risk (90%)
• 9 and above - straightforward (100%)
  

Success

Dried Flesh

The tentacle would make a tremendous tail, writhing and lashing.

•  You've lost 1 x Skeleton: Tails Needed
•  You've gained 1 x Skeleton: Tails
•  You've gained 250 x Approximate Value of Your Skeleton in Pennies
•  You've lost 1 x Withered Tentacle
•  You've lost 1 x Skeleton: Antiquity

Failure

Dried Flesh

Even with care, you can't make the tentacle-tail look anything but far-fetched.

•  You've lost 1 x Skeleton: Tails Needed
•  You've gained 1 x Skeleton: Tails
•  You've gained 250 x Approximate Value of Your Skeleton in Pennies
•  You've lost 1 x Withered Tentacle
•  Your skeleton has become less believable. (Raises Skeleton: Self-Evident Implausibility by 2)
•  You've lost 1 x Skeleton: Antiquity