Core Implosion

You target one creature, object, or structure within range with catastrophic inward force.

A creature must make a Constitution saving throw. On a failed save, it takes 12d10 force damage and is stunned until the end of your next turn. On a successful save, it takes half as much damage and is not stunned.

An object or structure takes 80 force damage automatically. If this damage destroys part of a structure, the surrounding area may collapse at the DM’s discretion.

A Gargantuan creature has advantage on the saving throw.