The 4th edition allows characters to take a feat that grants access to specific facets of another class. The class-specific multiclass feats are also prerequisites for the power-swap feats, each of which allows the character to swap out a daily, encounter, or utility power from their first class for one from their second class. Also, at level 11, a character with a multiclass feat and all of the power-swap feats is eligible for paragon multiclassing, which allows them to gain additional powers from their second class in lieu of taking a Paragon Path. Some classes are only available through multiclassing; the first such class was Spellscarred, introduced in the Forgotten Realms Player's Guide. In the 4th edition, each character can only multiclass into a single class, unless otherwise stated by their primary class (such as the Bard). The "Player's Handbook III" introduced "hybrid" classes, a deeper form of multiclassing in which elements of two classes are combined each level.