Quick Travel / Taxi
For Republic players, this will be fairly close to where you load in to Ilum, for Imperial players this will be a very far run south.
Find the Exhaustion Zone
Run around the pillar of ice
Ilum Blue Mastery Datacron Guide
The Ilum Blue Mastery Datacron is located in the Eastern Ice Shelf map on Ilum grants Mastery +4 (it used to grant Aim +4 before the stats changed).
The Ilum Blue datacron is in the southeast corner past an exhaustion zone and is available to both Imperial and Republic players. Finding this datacron will give you a permanent stat boost of Mastery +4 to all your characters on your server, and will unlock the Galactic History 83: The Republic Rebuilds codex.
Ilum Mastery +4 Datacron (Both Factions)
Quicktravel: 
Republic Outpost / 
Imperial War Camp
Taxi: Republic Outpost / Imperial War Camp
Location: Eastern Ice Shelf - southeast corner past an exhaustion zone
Difficulty: Easy - can walk right up to it
Codex: Galactic History 83: The Republic Rebuilds
Bluesky @swtorista.com
Discord 
Reddit /u/swtorista
Email swtorista@gmail.com
Twitch Swtorista
Youtube
Patreon
Twitter @swtorista