Ever noticed how much Intense Flames SUCKS? Seriously, if you're burning someone alive with a short-range stream of fire, or trying to hit them with a long-range firebolt toss, you do NOT want them running away in Talos knows what direction. So use this perk. You can get it when you can get Intense Flames! What does it do? Simple. "Spell range is increased by your Destruction skill multiplied by 1.5". This is more useful than it sounds.