DISCLAIMER: Your Steps and Tasks may be different
You need to have good Skyros faction to do this quest.
1) Travel to Mesothalassa loc=16.5k, 34.9k and speak to Glycon.
2) Glycon will send you to go speak with Alyciana in Mesothalassa 12.5k, 32.2k.
3) Alyciana will send you to kill one Melos and Naxos triton. They will drop blood.
4) Take the blood and combine it ('E' key on toolbar) and it will create a potion.
5) Place the potion on your hotbar and use it to update your journal to see what you need to do next.
6) Travel to Oceanus Notos loc=42.9k, 49.1k and kill Khahet. Upon his death he will drop half of a Broken Tablet.
7) Return to Alyciana in Mesothalassa and hand her the tablet. She will give it back to you to read and then request it back along with the potion you created.
8) Alyciana will then send you to kill Bryseia (45k, 23.2k) and Mikon (41.7k, 46.8k) in Mesothalassa.
9) Return to Alyciana for your reward.
lvl 45 received 1,407,188,992 exp and 15 gold.
lvl 48 received 2,132,899,648 exp and 15 gold.
Skyros Octopus Skin Sleeves -- Infiltrator and Friar
Skyros Eel Skin Pants -- Bonedancer, Runemaster, and Spiritmaster
Skyros Spiny Urchin Boots -- Champion, Hero, and Warden
Skyros Starfish Studded Vest -- Scout
Skyros Laced Eel Skin Pants -- Animist, Eldritch, Enchanter, Mentalist
Skyros Spiny Urchin Hauberk -- Druid
Skyros Octopus Tentacle Sleeves -- Shadowblade
Skyros Sea Urchin Boots -- Skald, Thane, Warrior and Valkyrie
Skyros Crabshell Boots -- Armsman, Paladin
Skyros Sea Urchin Hauberk -- Healer, Shaman
Skyros Starfish Wrapped Sleeves -- Bard, Blademaster, Ranger
Skyros Woven Eel Skin Pants -- Heretic