Zone of Power (5e Spell)
From D&D Wiki
|Casting time:||1 action|
|Components:||V, S, M (a small quartz sphere worth at least 100 gp, and an acorn or a few pieces of wheat chaff)|
|Duration:||Concentration, up to 1 minute|
You create a zone of slightly bluish energy that suffuses an area you can see. Choose a 15-foot cube within the spell's range that you can see. That area takes 4d6 force damage at the start of each of your turns. Creatures within the area must make a Dexterity saving throw, taking full damage on a failed save, or half as much damage on a successful one. You may use a bonus action on your turn to move the zone up to 15 feet.
At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, increase the damage by 1d6 for each slot level above 6th.