Magic cubes

[quasi ember]

i found a merlin trial near the castle and i think this cube has somthing to do with it but it disspears after i try to move it around with accio

[worn coral]

not for a merlin trial, rather a puzzle for a cave entrance... there should be a cave nearby with a platform, place the cube there and use Levioso on it

[quasi ember]

but how do i move it whenever i attempt to move it just teleports back