Ring of Deadly Power

Gives you +30% EXP, +20% defence chance against Suras, +20% defence chance against Shamans, +20% defence chance against Lycans, +30% strength against monsters, +10% maximum HP and +10% maximum SP for a period of time.

Stats

Max. HP +1000
5% Chance for piercing Hits

Sources

No source listed in the game wiki.