Corpse Bomb (Revised)

You target the corpse of a creature that has been dead for no longer than 1 week that you can see within range. Each creature within 10ft of that corpse must make a Dexterity saving throw, taking 2d8 Thunder damage on a failed save and half as much on a success. The radius changes depending on the size of the corpse, increasing by 5ft for each size category larger than medium. After the corpse explodes, you can choose to have 1 Crawling Claw appears in its place under your command.

Any Crawling Claw created by this spell obeys your commands. It does not move or take actions unless commanded to do so as a bonus action. In combat it moves and acts on your turn. If a Crawling Claw created by this spell is reduced to 0 hit points it turns to dust, leaving no remains behind. If you choose to create a Crawling Claw with another casting of this spell any pre-existing Crawling Claws created by your casting of this spell turn to dust. 

When  you cast this spell at 2nd level or higher,  the damage increases by 1d8 for each level above 1st. The number of Crawling Claws you can create in a single casting increases by 1 when cast as a 2nd level spell and again for every two slot levels above 2nd.