Arcane Artillerist (5e Feat)
From D&D Wiki
Prerequisites: Ability to cast spells
You have trained in the art of war in it's deadliest form, the power to destroy armies through the might of the arcane.
Three times per day you can cast an expanded spell. The chosen spell is modified in the following manner.
If the spell has a range greater than self, the range is doubled. Your spells' area or reach is also doubled (15-foot cone becomes 30-cone, 20-foot radius becomes 40-foot radius, etc.)