My Little Pony: Friendship is Magic - King Sombra is Princess Platinum's Dad!

@Viuff
-Shadow and frost
-Soul trapped in a frozen prison for a time
-Dwells a frozen wasteland
-Had a heart
-Green eyes with a glow
-Enslaves his own kingdom
-Indirectly defeated by a paladin
-Largely inspired by LotR villains

Bloody fuck

Without it's masters command the Crystal empire will fall apart and take it's subjects with it,
control most be maintained.. there most always be a Crystal King.