Damon's Clangorous Cogs

Calling upon the essence of Mechanus, you summon a complex, impervious magical machine to an unoccupied space you can see within 30 feet of you. If a creature starts its turn within 5 feet of the machine, it takes 5 points of Thunder damage from the deafening whir of the machine's inner workings. This damage cannot be reduced in any way, except if a creature has immunity to the spell's Thunder damage. Additionally, you can use a bonus action on your subsequent turns to move the machine to another unoccupied space you can see within 30 feet of its current space.

At Higher Levels: When you cast this spell using a spell slot of 4th level or higher, the damage increases by 5 for every two slot levels above 2nd.