Serenity of the Dalanthans (requires attunement)

This is magical item has been given through generations of the Dalanthan family. It is a sign of the leader of the Dalanthan family. It is a jeweled headwear that is one who looks after people. It protects the wearer both against outside forces and the wearer him/herself.
The leader of the Dalanthan family also needs to know who to trust, though it is mostly the judgement of the leader. This item however will be of aid when supernatural forces are at hand to make sure everybody is still themselves. On the front there is a Sephron crystal which is beautifully engraven with sigils that power this magical item.
The wearer of this item:

• When the wearer intensely meditates for 10 minutes after a long rest he/she gains a +2 to wisdom saving throws for the rest of the day.
• The ability "Stillness of mind" now is a a bonus action instead of a action
• Whenever you attack somebody who is charmed and the charm can be broken by damage taken the charmed person has advantage on the save.