Board Thread:General Discussion/@comment-6302057-20140906122542/@comment-5834856-20141113090347

Once you take a beast's or person's heart using a spell out of his chest it becomes enchanted. (The Doctor)

Well, I thought the difference between enchanted hearts and frozen hearts is the following.

You can live well enough when your heart is enchanted (outside of your body). You're dead, if it freezes.

Taking Marian's heart Regina said "the ice hasn't touched her heart, yet. We can keep her alive." So, I guess, if you're heart freezes, it might have the same effect like crushing it.

In "The Snow Queen" Ingrid accidently directs her magic at Helga's chest. Within seconds Helga becomes an ice brick like Marian. Compared to Marian it happens much faster, though. The whole body becomes as fragile as ice itsself, endangered to crumble at the slightest touch. When Regina took Marian's heart tiny ice pieces chiped of her body.

If you ask me enchanted hearts glowing red coverd with ice might look pretty cool.