Although I do not know all the forms of Saraswathi that are explained in the Scriptures, I heard about Swetha Saraswathi, Neela Saraswathi, and some others. Each such devi has a visual form, mantra, and tantra upasana.
I think that these forms are cryptic/implicit in well-known scriptures such as puranas, ithihasas, etc., but are explicit in the scriptures of Tantra.
I know that every such form has an associated mantra, which generally has to get initiated by a Sidda guru. In which scriptures of tantra, forms of Saraswathi are mentioned along with other associated information such as mantras?
Is there a single scripture that enumerated all the forms of Saraswathi or are they mentioned across several scriptures?