Create black hole

At level one create a black hole that dose 1 d20 Damage at level 5 create one black hole that dose 3 d20 Damage at level 20 create three black holes that dose 3 d100 Damage 

this spell is most useful when built into a magic weapon or tool and does damage to every enemy within 20 feet of the user and the weapon protect its master from the black holes damage at the DM‘s discretion. This could either do damage to terain or not