Blue charm

Blue charms are used in the Summoning skill to summon certain creatures. The amount of experience gained from using a blue charm varies from 59.6 to 783.2 depending on the pouch made, thereby making the blue charm the overall strongest one (although creating a Talon beast pouch with a Crimson charm grants the highest xp of all pouches at 1015.2, and the highest level pouch requires a crimson charm). They are the rarest of the charms but can be obtained as a drop from various monsters.

Familiars
Blue charms are used to create summoning pouches for the following familiars:

Monsters that drop them

 * Aberrant spectres
 * Abyssal demons (rare)
 * Abyssal walkers
 * Ankous (rare)
 * Armoured zombies
 * Banshees
 * Basilisks
 * Black Demon (exteremely, extremely rare; 1 in 200)
 * Black dragons (3)
 * Black Knights
 * Bloodvelds (rare)
 * Blue Dragons
 * Bork (100% drop of 5)
 * Brutal Green Dragons
 * Brine rats (rare)
 * Catablepons
 * Cave crawlers
 * Chaos dwarfs
 * Cockatrice
 * Cockroach soldier
 * Cockroach worker
 * Crawling hand (very rare)
 * Cyclops
 * Dagannoth
 * Dark beasts (common)
 * Deadly red spiders
 * Dust devils
 * Dwarfs
 * Fire giants (rare)
 * Flesh crawlers (uncommon)
 * Giant Crypt Rat (extremely rare)
 * Giant Rock Crabs 3 at a time
 * Gargoyles
 * Greater demons
 * Green dragons
 * Guards
 * Hellhounds
 * Hill giants
 * Ice giants (uncommon)
 * Ice warriors (rare)
 * Iron dragons 2 at a time
 * Jellys
 * Jogres
 * Jungle horrors (rare)
 * Kalphite Guardians
 * Kalphite Soldiers (uncommon)
 * Kalphite workers
 * King Black Dragon 4 at a time
 * Kurasks
 * Locust riders
 * Mithril Dragons 4 at a time
 * Moss giants
 * Mutated bloodveld (very rare)
 * Nechryael
 * Ogres (rare)
 * Rock crabs (rare)
 * Pyrefiends (semi-rare)
 * Shadow warriors (rare)
 * Skogres (rare)
 * Skeletons (rare)
 * Steel dragons 3 at a time
 * Terror Dogs (uncommon)
 * Tormented demons (3; common)
 * Tormented Wraith (common)
 * Turoths (rare)
 * Wall beasts
 * Wallasalkis
 * Warped tortoises
 * Wizards (rare)
 * Wolf (25)
 * Zogres (rare)

Other Charm Obtaining methods
Lesser Demons

Thieving

 * Dorgesh-Kaan Average Chest
 * Dorgesh-Kaan Rich Chest

Soul Wars

 * Soul Wars Rewards
 * Players need to exchange 30 zeal points for blue charms.