Enchanter's ring does not have the mana subtype. But I was wondering, what difference does it make to have the mana subtype? any specific card works with mana cards? or having the mana subtype gives a trait? For what I remember from the codex, handbook and the cards I've read (I'm still kinda newbie) I can't tell what difference would it make to give or not give the mana subtype to the enchanter's ring. Can someone enlighten me?