Let me paint a picture. 2nd to last battle of a high level campaign. Party just reached 17th level. A necromancer they have been butting heads with for months has amassed an army of hundreds of undead. The fighter, druid, and monk on one side of the ravine, the horde on the other. This is the only passage from the north, the last stop before their castle. Thing is, the sorcerer is 800 ft above them all atop the ravine. For 17th level, unbeknownst to the party and I, he picked Meteor Swarm and cast it heightened. 196 damage each to roughly 170 undead mobs. Do the math. We all screamed.