Rolled into one
Definition 1 of 1
Pro Tip 1/3Usage Clarity
Use 'rolled into one' to clarify that something has multiple functions or roles, not just one. 
This device is a camera, computer, and phone all rolled into one.
Pro Tip 2/3Metaphoric Expression
'Rolled into one' is a metaphor suggesting different elements are combined as seamlessly as one. 
Our new team member is like five specialists rolled into one.
Pro Tip 3/3Not Literal
Understand that 'rolled into one' is never used in a literal sense, but always figuratively. 
This book is a thriller, mystery, and romance all rolled into one.