While holding this magical quarterstaff you can use an action and expend charges to cast one of the following spells, using your spell save DC: charm person (1 charge), command (1 charge), comprehend languages (1 charge).
Once per dawn, when you are holding the staff and fail a saving throw against an enchantment spell, you can instead choose to succeed. When you succeed on a saving throw against an enchantment spell (with or without the staff’s intervention) you can use your reaction to expend 1 charge from the staff and turn the spell back on its caster (targeting only them), as if you had cast the spell.
The staff has 10 charges and regains 1d8+2 expended charges each dawn. When the last charge is expended, roll a d20. On a 1, it loses its magical properties.