very strange;unnatural,mysterious and/or frightening
unusual and not sensible or acceptable
"an eldritch screech"
"the three weird sisters"
"stumps...had uncanny shapes as of monstrous creatures"
"an unearthly light"
"he could hear the unearthly scream of some curlew piercing the din"
"some trick of the moonlight; some weird effect of shadow"
Like some weird Archimage sit I, Plotting dark spells.