Eldritch Blast - Flame Variant

A bolt of searing flame streaks toward a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d8 fire damage. On a successful hit, the target must also succeed on a DC Dexterity saving throw or be caught on fire. Targets on fire take a flat 5 fire damage at the start of each of their turns. They must use an action to put themselves out. 

The spell creates more than one bolt when you reach higher levels: two bolts at 5th level, three bolts at 11th level, and four bolts at 17th level. You can direct the beams at the same target or at different ones. Make a separate attack roll for each blast.