Both types of Elixirs are no longer sold in the Nexus, currently the only way to obtain them is by opening vault chests. Both cost Realm Gold, both came in Doses of up to seven, and both in the full range of doses are Soulbound. The number of doses are shown as a number in the top left corner of the item image.
Elixir of Health: A large vial of healing elixir.
+125 HP, a single dose is consumed on use.
Elixir of Magic: A large vial of magical essence.
+125 MP, a single dose is consumed on use.
Elixirs can be fed to pets. The number of doses determines the feed power. Elixirs with seven doses have 35 feed power, and with one less dose there is 5 less feed power. At one dose, it has 5 feed power.