To obtain Flame Cloak you can talk to Faralda at the College of Winterhold. Note this spell is an Adept level 50 skill so it’ll take a bit of time to reach it but for sure it’s worth learning.
It’s fair to say damage is a bit low, but if the enemy is already on fire they will take even more fire damage which can add up fast. This is best used by battle mages and melee fighters since it surrounds your Dragonborn with a strong aura of fire. This wall of fire lasts for 60 seconds and enemies in range get hit with 8 points of fire damage per second. Your play style can influence your Dragonborn and when combined with the best destruction spells in your arsenal you’re bound to crush enemies in dungeons all over Tamriel. Not to mention that maintaining your magicka can be tough since it seems to grow quite a bit slower than other skills. It’s important to know which spells are best prioritized early on to avoid wasting your gold. Most of these destruction spells are best used in combination with other skills to deal greater damage, or combined with a real strategy.
These spells can be acquired through spell tomes from vendors around Skyrim, or looted from chests.
These are divided into 3 categories called “Branches”: Fire, Frost, and Lightning. Destruction spells are the main offensive skill for mages.