Anvil Drop

You summon a spectral, glowing anvil forged from the divine fires of your deity. The anvil hovers in the air within range and lasts for the duration or until you cast this spell again.

When you cast the spell, you can make a melee spell attack against a creature within 5 feet of the weapon. On a hit, the target takes force damage equal to 1d8 + your spellcasting ability modifier.

Crushing Blow (Action Economy): On the turn you cast this spell, you use your Bonus Action. On subsequent turns, you can use your Action (instead of a Bonus Action) to move the anvil up to 20 feet and repeat the attack against a creature within 5 feet of it.

Forged in Fire (Critical Hits): The anvil is a brutal weapon of absolute order. This attack scores a critical hit on a roll of 19 or 20.

In a critical hit the target must succeed in a constitution saving throw DC 15 if the damage is more than it's critical physical damage threshold or gain a level of exhaustion

Heavy Metal (Critical Damage): When this spell scores a critical hit, the damage is calculated as follows: