Daily Punch 9-18-13 Rod and Staff to increase spell save DC?

Aura strong no school; CL 13th
Slot none; Price 82,000 gp; Weight 5 lbs.

DESCRIPTION

Often made from plain oakand carved to have a twist in the middle.  This staff never seems to become dirty.  This staff allows use of the following  abilities

• cast as spell affected by  Spell Concentration , lesser (1 charge)
• cast a spell affected by  Spell Concentration  (2 charges)
• cast a spell affected by  Spell Concentration , greater (3 charges)
• Cast a spell affected by a metamagic feat you know, without changed the level of the spell when cast (4 charges)

CONSTRUCTION REQUIREMENTS

Craft Staff, spell concentration, lesser, spell concentration, spell concentration, greater; Cost 41,000 gp.