How about a nice magic item for DnD Next?
Rare magic weapon (staff)
This staff is made from a spine of a single creature. The end of the spine is topped with a human skull. It has been cleaned and bleached white. No visible factors hold the spine together except for sheer power. Increase the DC of all your spells cast by 2. Also, three times per day when you cast a necromancy spell, impose disadvantage on the saving throw for that spell or gain advantage on any check needed for that spell.