Kremmel is the God of Struggle referenced in the Ring of Thorns description. The description suggests he may have a role as a god of vengeance.
Ring granted protection by Kremmel,
god of Struggle.
The ring's spikes drive into the wearer's
skin, so that each blow taken fuels spite
toward the perpetrator.
When damage is taken, the ring retaliates
and inflicts damage upon enemy.
His symbol on the Name-engraved Ring is a black arrow pointing upwards, and contrasts with Hanleth, Goddess of Bliss' symbol which is a white arrow pointing downwards