I want help with the mechanical side of creating a kith based on jewish mythology

I recently got the 20th edition of changeling the dreaming and I am quite enjoying the book, and I want to create kith based on creatures from jewish myth and I would appreciate the help with regards to creating them on the more mechanical side.

Currently I have 2 solid ideas for kith:

A kith based on the man of the field (extremely strong plant people who have an umbilical cord connecting them to the ground, which once separated die)

A kith based on the shamir (a weird worm that is able to split anything and was supposedly used to build the first temple)

These kiths are mostly common where jewish community exist and have a strange relationship with other changelings for their very close relationships with either the thallians (in the case of the people of the field who are very close to being thallians themselves I think, possibly born from the dreams of things hunting men and beast through fields of tall vegetation) or humans in the case of the shamir (who were pivotal to building the first temple in aincent Jerusalem)

I have some ideas regarding their affinities:

Nature for people of the field and prop for the shamir, but I don't have a solid mechanical idea as to how to represent their birthrights and frailties.

If you all could help I would appreciate it very much