Are you tiring of adding varies of buffs after long rest, to the point you are avoiding long rest? This item is right for you!
It adds the following buffs to all allies in 90m/300ft radius:

1. Longstrider
2. Mage Armor (to those who are not wearing armors)
3. Aid (level up with wearer)
4. Darkvision (12m/40ft)
5. Death Ward
6. Bardic Inspiration/Combat Inspiration (level up with wearer)
   7. Protection from Poison
   8. Freedom of Movement
7. Heroes' Feast

Buffs the ring can provides are all according to what buff are available at the current level of the wearer. For example, if the wearer is at Lv. 7, then the ring will provide:

1. Longstrider
2. Mage Armor 
3. Aid Lv. 3
   4. Darkvision
4. Death Ward
5. Combat Inspiration 1d8
   7. Protection from Poison
   8. Freedom of Movement

The ring is an unique item and can only be purchased from Arron in Emerald Grove. A non-unique version is added for those in need. The spell can be cast once per short rest.