Is there a way to inherit case info to a task?

Hello there,

We need to be able to inherit information from CASE entity to a task when creating a new activity (task), is there a way to do it?

We tried:

1- from the relationship itself, but no mapping option is shown

2- business rule, not possible

3- workflow rule, not possible due to is not possible to specify something like ¨Regarding equals Case Record¨

Does anyone know a way to do it?