The Ring of Tulkas
+4 to strength, dexterity and constitution. It provides protection from
the effects of cuts. It cannot be damaged by any means. When worn and
activated, it hastes you for a very long duration, recharging every
150+d150 turns.
Level 70, Rarity 50, 0.2 lbs, 75000 Gold.

(EyAngband 0.5.2)