Made by an ogre shaman for his not so bright nephew Tog. Knowing that intelligence would never "be his thing" the shaman chose, instead, to build on Tog's talents. (Naming items wasn't one of them either) 

This ring is made of gold, with a strange lighter metal wrapping the band and covered with runes. This center wrap can spin freely.

while wearing this ring the wearers CON is increased to 19. 

If the wearer uses an action to  place two fingers on specific runes for 3 seconds, then spin the center band it activates a spell called Tog's Rage.

Upon activation, for the next 10 minutes, the wearer's STR is increased to 23 (unless already higher), and the wearer is granted 20 temporary HPs. INT and WIS are reduced to 7 for the duration of the spell, and all WIS and INT saving throws are made with disadvantage.

The wearer will need to eat soon after the effect wears off and will be afflicted with level 1 exhaustion, as well as losing the 20 temporary HPs and 20 additional HPs. Health cannot be taken below 1 due to this effect. Ogres aren't complete idiots after all. (At least the shamans anyway.)

Notes: Set: Constitution Score, Buff, Combat