Lost druid campaign

[Sergio]

Hi, I've got a question: does anyone know what to do after having put all the 4 items inside the artificer's forge? I''m trying to make a mana battery to no avail

that's the campaign I'm referring to: http://www.hiveworkshop.com/forums/maps-564/last-druid-80437/index3.html

Sorry for the error on the title.