I made this Crystallized Life farming guide to help out players who want to farm Crystallized Life instead of buying them from the Auction House.
Eternal Life comes from combining 10 Crystallized Life, so if you need Eternal Life, you have to farm Crystallized Life.
Buying Eternal Life from Vendors
Fortunately, you can buy [Frozen Orb] from vendors for 75 gold. (you should check the Auction House just in case Frozen Orb or Eternal Life is cheaper there)
Frozen Orb vendor location:
Both of these vendors are at old Northrend Dalaran. You can't find them at Broken Isles Dalaran!
- Alliance: Arcanist Ivrenne is inside The Silver Enclave. You'll find her in the room at the top of the stairs to the right.
- Horde: Magistrix Lambriesse is inside Sunreaver's Sanctuary.
Thornvine Creeper in Howling Fjord is the best source of Crystallized Life. They respawn really quickly, so you can farm here without downtime.