Check the book :
TSR02163 :Player's Option Spells & Magic. At page 20
About magical items created by the artificer, the book has an warning
Eberron artificer is vastly different than AD&D one. DDO seems to be based on 3.5e, with a lot of homebrew stuff. A lot of AD&D stuff and a lot of 5e stuff.
They changed a lot from 2e, 3.5e, 4e and 5e. In 2e, they where a Mage "kit".
Page 103 of the Player Options : Spells & Magic sourcebook :
And had really nasty consequences for having such dark powers :
In 3.5e, it had SLA as form of invocations, divided in least, lesser, great and dark Invocations. In 4e, IDK, I hate 4e. In 5e, with every spell up to 5th tier being regain on short rest and Eldritch Blast is a cantrip modified by invocations, not an SLA.