Select an unevolved enemy follower on the field and return it to its owner's hand. Spellchain (10) - Put it on top of its owner's deck instead.
QCan I select 0 followers for this follower's Fanfare ability?
AYes. When prompted to select "any number" of something, you can select 0.
QIf the enemy followers on the field are an evolved Diamond Master and a different, unevolved follower, can I select the latter when playing Rimewind?
AYes. Rimewind requires you to select an unevolved follower, and the Diamond Master is evolved, so you can't select it.
QIf the enemy followers on the field are an unevolved Diamond Master and a different unevolved follower, can I select the latter when playing Rimewind?
ANo. You can select the unevolved Diamond Master with Rimewind, so you must select it.
QIf my Spellchain is 10, can I select an evolved enemy follower with this spell?
ANo. Regardless of whether you meet the Spellchain requirement, you can only select an unevolved follower.