Dark Star

8th-Level Evocation
Casting Time: 1 action
Range: 150 feet
Components: VSM (a shard of onyx and a drop of the caster's blood, both of which the spell consumes)
Duration: (C) 1 minute

As in Explorer's Guide to Wildemount except base damage has been reduced to 10d6 force damage instead of 8d10 force damage and the following has been added:

At Higher Levels. When you cast this spell using a spell slot of 9th level or higher, the damage increases by 1d6 for each slot level above 8th.

Source: EGW 186

Changelog

Altered base damage to 10d6 from 8d10.
Added upcasting option.