The berserker ring is one of the Fremennik rings and is dropped by the Dagannoth Rex in the Waterbirth Island Dungeon. The Berserker ring is considered to be a cheap, yet decent hybrid ring for low level players.
This ring can be imbued at Mobilising Armies with a rank of 300 or more, for 205,900 reward credits, into a Berserker ring (i). This increases the strength, range, and magic bonuses to 17 and armour rating to 18. Selling the ring after imbuing it is generally not advisable as it will waste 205,900 reward credits. Unlike other items at Mobilising Armies, points will not be refunded for ring enchantments.
When received with CoinShare active, the Berserker ring will be dropped as 120 Berserker ring shards split evenly among the players and sent directly to their banks. 120 shards can be combined to create this item.
Two passive effects: 50% chance of restoring up to 5% adrenaline when a target is killed; teleports the wearer to their respawn point with all of their items when they die, at a cost of 15% charge (effective cost 692,260.2 coins)
Degrades: has 100,000 hits of combat, and can be recharged by 50% with a cut onyx (100% charge costs 4,615,068 coins)
Two passive effects: 10% chance to prevent adrenaline loss when using threshold abilities; 40% chance to save a quarter of a special attack's base cost (e.g. 60% becomes 45%).
Passive effect: 10% chance of crafting an additional air, earth, fire or water rune per essence, at the appropriate altar, granting additional experience.
Operate: Three charges per day to replenish 50% of run energy.
Operate: 30 runeless casts of Low Level Alchemy per day; requires level 21 Magic.
Operate: 27 runeless casts of Superheat Item per day; requires level 43 Magic.
Operate: 15 runeless casts of High Level Alchemy per day; requires level 55 Magic.
Operate: Cabbageport - Unlimited teleports to the Falador farm cabbage patch.
Passive effect: 10% chance of crafting an additional air, earth, fire or water rune per essence, at the appropriate altar, granting additional experience.
Operate: Three charges per day to replenish 50% of run energy.
Operate: 30 runeless casts of Low Level Alchemy per day; requires level 21 Magic.
Operate: Cabbageport - Unlimited teleports to the Falador farm cabbage patch.
Passive effect: 10% chance of crafting an additional air, earth, fire or water rune per essence, at the appropriate altar, granting additional experience.
Operate: Two charges per day to replenish 50% of run energy.
Operate: 30 runeless casts of Low Level Alchemy per day; requires level 21 Magic.
The symbol on the ring seems to be a hammer, representing the damage bonus.
Before the Evolution of Combat was released, the average price of the ring was around 1.9-2.5m because of the strength bonus it gave. It has been falling in price ever since due to the fact that there are fewer monsters that require using all three types of combat, and cheaper better alternatives are available.
All of the Fremennik rings dropped in price after the release of The World Wakes; a Grandmaster quest which features a reward called the Sixth-Age circuit, which gives +21 strength in every combat style.