I made this plugin by request of a friend, and because I didn't have anything to do.

Features:

• PlaceholderAPI support
• Staffmode
• Freezing (through command or freeze wand in staffmode)
• Open inventory (through command or inventory wand in staffmode)
• Knockback Stick (in staffmode)

Commands and permissions:

• /staffmode - staff.staffmode
• /freeze - staff.freeze
• /openinv - staff.openinv

Staff mode items:

• Disable staffmode - staff.staffmode
• Freeze wand - staff.freeze.wand
• Inventory wand - staff.openinv.wand
• Knockback Stick - staff.kbstick