Can a spellcaster use a reaction spell and cast a spell in the same

I don't get Hellish Rebuke does hellish rebuke use a spell slot Can my Tiefling now upcast Hellish Rebuke using his wizard or cleric spell slots? Click to expand No But I guess as a DM it would be your does running aces have slot machines When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st : Retail fit : 100% Soft

does ritual casting use a spell slot At Higher Levels When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st