"of all forms" is a correct and usable phrase in written English.
You can use it when you want to refer to a variety of different things or types. For example, "We offer a wide range of services, of all forms."
10) Prohibition of all forms of religious intimidation and threats.
1) Abolition of all forms of private property in ideas.
In 2005, the agency approved Xyrem for the treatment of all forms of narcolepsy.
"We're seeing increasing control of all forms of life by computers.
Of all forms of passport fraud, this is one of the most frightening.
"One of our goals is to learn lessons about the longevity of all forms of artworks".
If the SF152 is the mother of all forms, what gave birth to the SF152?
Blithe images of all forms of animal production hide the bleak realities.
And artists of all forms will have to start thinking about a change in career.
"It is the best of all forms: open and personal, intelligent and inquiring.
Your political system is the Utopia of all forms of government, autocratic and otherwise.
