Crystal bow

The Crystal Bow is a powerful bow available after a player completes the Roving Elves quest, and an optional reward from the quest alongside the crystal shield. To wield the crystal bow, a player must have 70 Ranged and 50 Agility. It is widely considered the best bow in the game, but at the same time, difficult to maintain. It can be considered similar to the barrows rewards due to its substantial power and pricey repair costs. The crystal bow is unique in that it doesn't require that a player have any equipped arrows, but rather arrows seem to appear on the bow string when the player is about to fire.

The crystal bow degrades over time. When a player obtains a new crystal bow, it will be a New Crystal Bow. However, after 250 shots, it degrades into a "Crystal Bow 9/10", and for every 250 shots thereafter it will degrade another 1/10th, until it reverts into a crystal seed after a total of 2,500 shots. As the crystal bow degrades, its ranged attack bonus drops, as shown on the table below. Once the crystal bow has reverted to a crystal seed, a player can buy a New Crystal Bow for the cost of 900,000 coins, or have their crystal seed enchanted into a bow by Ilfeen. While having the seed re-enchanted costs 900,000 coins for the first time, the price lowers each time you get it re-enchanted. The first recharge costs 900k coins, the second 720k coins, the third 540k coins, the fourth 360k coins, and the fifth and every time thereafter costs 180k.

Multiple Bow Use
The bow degrade is not linked to any particular bow, but to the player. This means that a player can switch bows just before the degrade will occur and accumulate all the degrades in a single bow. The actual training can take the advantage of the strength of a full (10/10) bow.

Bugs
Shortly after its release, the crystal bow was the basis of a critical but isolated bug. Players were able to buy the fully charged bow for 180,000 coins in a member server, then high alchemy the same item for 540,000 in free-to-play. Because the bug was abused by very few players, Jagex was able to ban the accounts that abused it. In response, Jagex also prevented all players from alching member items in free-to-play servers.