Cosmic Bolt (Cosmomancy)

You make a ranged spell attack roll against a creature within range, as you fling world altering magic at them. On a hit you deal 1d8 of an indeterminate damage type. The damage this spell deals is of a damage type which would be most effective against the target. The DM determines the damage type, informs you of which type it is and also to what extent it affects the creature (vulnerability or standard, etc.)

At higher levels. When you cast this spell with a spell slot of 3rd level or higher the damage increases by 1d8 for each slot level above 2nd.