[Rumil]

Thranduil and co. certainly used 'magic' items,

eg the swords that glowed blue at the Battle of the Five armies, probably the doors, though they might possibly be some high technology - magnetic locks?? Also the lanterns which iirc are described in Mirkwood, like the 1st age elven lanterns.

Thay also seem to have used 'magic spells' of some sort, just like Gandalf. When Bilbo and the dwarves approached the elven parties in the Forest, they fall asleep, which has to be some sort of magic.

Though as Eomer and Nerwen pointed out, this might well not be the right terminology.