Blue dragonhide: where to get it

Source	Quantity	Chance per roll
Acheron mammoth []	5–15	10/128
Arcane apoterrasaur []	10–30	Common
Asciatops []	15–35	Common
Astellarn (Normal mode) [{'content': 'Either blue, red, or black dragonhides are always dropped.', 'name': 'dragonhide'}]	5–10	1/3
Bag of lost items []	5	Uncommon
Bagrada rex []	12–29	Common
Blue dragon []	1	Always
Blue dragon (player-owned farm) []	2	Always
Celestial dragon []	2	10/136
Celestial dragon (Dragonkin Laboratory) (Normal mode) []	1	1/3
Corbicula rex []	15–35	Common
Transmutation (Equilibrium League) [{'content': 'Requires appropriate material to transmute from.'}]	1–10	Special
Glacor []	5–9	5/96
Malletops []	20–40	Common
Oculi apoterrasaur []	20–40	65/1,000
Pavosaurus rex []	21–40	Common
Rewards (Barbarian Assault) (Gamble points - high items) []	38	Common
Rewards (Barbarian Assault) (Gamble points - low items) []	11	Common
Scimitops []	11–29	Common
Spicati apoterrasaur []	15–35	Common
Telos, the Warden []	99–2,500	Uncommon
The Gate of Elidinis []	45	60/1,000, 4 rolls
Zemouregal & Vorkath loot (hard) []	60–90	75/1,000, 8 rolls
Zemouregal & Vorkath loot (normal) []	20–30	75/1,000, 4 rolls
Zemouregal & Vorkath loot (story) []	20–30	75/1,000