Waterfiend

Waterfiends are found in the Ancient Caverns, which can be accessed by completing part of the Barbarian Training, however they are accessible without completing all subsections. Whilst being the least harmful monster in the cavern, they attack with both magic and magical ranged attacks, which both hit up to 11. Waterfiends are also found in the Chaos Tunnels.

Waterfiends have a very high charm drop rate, especially for crimson charms. The drop rate for crimson charms appears to be roughly 85%. For this reason, they are targeted by many players who wish to level up summoning in a fast manner.

They are immune to poison, have strong resistance to slashing and piercing attacks, but are weak to crush attacks. Waterfiends are the elemental cousin of the Pyrefiend and the Icefiend.

It is advised to wear armour with very high magic defence (such as Karil's or Black dragonhide). Protect from Missiles or Protect from Magic prayer is also recommended, but not vital. Good weapons of choice would be ones that have the crush attack style along with a prayer bonus, such as a Godsword, Zamorakian spear, Saradomin sword, Verac's flail, Barrelchest anchor, or others. Another good tip is to take a tinderbox and logs since they drop raw lobsters and sharks, which could be cooked and eaten. Additionally, taking a Bunyip can increase the time players can stay there with both its innate healing ability as well as its special move allowing players to regain hitpoints from raw fish.

They tend to drop lots of raw fish, usually more than you can hold. A good way to keep this food is rotate dropping. This is constantly dropping and picking up the food so it won't disappear. For example, if you have a full inventory and they drop 6 raw lobsters, you would drop 6 of your food or potions and pick up the 6 raw fish. After 1-2 kills, you would then drop the 6 raw lobsters and pick up the 6 things you dropped. By keep doing this, it allows you to hold more. This can be very tedious but it will allow you stay alive longer without prayer pots. This can only be done with a Bunyip because of its ability to allow you to eat raw fish.

Waterfiends usually drop 1 water rune, 1 charm (typically crimson), and 1 other item (2 grimy herbs as the other item). Sometimes the other item is 90 water runes. This means if you examine the drop and see only a charm and water rune, the odds are good you have received a charm and 91 water runes. If you see a charm, a water rune, and something else (like a shark), the water rune is 1 and not 91.

Note: Waterfiends are resistant to magic, including fire spells.

Note: It is also worth mentioning, that while it may cost a certain amount to kill waterfiends, through use of prayer potions, food or familiars etc, players can at least break even through picking up noted water orbs, snape grass, and ranarrs. Water battlestaves can also be high alched for 9,300 coins.

Waterfiends had an unannounced graphical update on the 5th June 2008 - with this some of their drops changed. Then, later that day, a system update after Smoking Kills was updated to remove the drop change, only to be changed once again to fix some bugs and change some of the drops that were mentioned on the forums.

Locations
Waterfiends may be found in:


 * The Ancient Caverns
 * Chaos Tunnels

Drops
 Always 
 * 1 Water rune

 Runes 
 * 9-19 Death runes
 * 4-12 Blood runes
 * 90 Water runes (in addition to the one always dropped)
 * 3-9 Mud runes
 * 3-10 Steam runes
 * 3-10 Mist runes

 Seeds 
 * 1-4 Watermelon seeds
 * Mushroom spore
 * Poison ivy seed
 * Jangerberry seed
 * Strawberry seed
 * Spirit weed seed
 * Tarromin seed
 * Marrentill seed
 * Toadflax seed
 * Ranarr seed
 * Kwuarm seed
 * Snapdragon seed
 * Dwarf weed seed
 * Whiteberry seed
 * Wildblood seed

 Weapons and Armour 
 * Rune medium helmet
 * 5 Rune javelins
 * Adamant chainbody
 * Mithril warhammer
 * Mithril full helmet
 * 90 Mithril arrows
 * 15 Sapphire bolts
 * Blue d'hide vamb
 * Water battlestaff
 * Staff of Water
 * Rune spear(Rare)
 * Dragon spear (Very Rare)

 Other drops 
 * 97-691 Coins
 * 3 Steel bars (noted)
 * 1-5 Mithril ore (noted)
 * 2 Mithril bars
 * 5-10 Water orb (noted)
 * 5-10 Vials of water (noted)
 * Half of a key
 * Shield left half
 * Level 3 Clue scroll
 * Nature talisman
 * Water talisman
 * 5-12 Raw lobsters
 * 3-6 Raw sharks
 * Shark
 * 2 Grimy herbs
 * 20 Snape grass (noted)
 * 11-29 Seaweed (noted)
 * Oyster
 * Fishbowl
 * 1 Grimy Ranarr
 * 2-4 Uncut sapphire (noted)
 * 1 Uncut sapphire
 * 1 Uncut Diamond (extremely rare)
 * 1 Grimy dwarf weed

 Charms 
 * Crimson charm (Very frequent)
 * Green charm
 * Gold charm
 * Blue charm