Fire mages ignite enemies with balls of fire and combustive flames, harnessing the unrivaled destructive power of fire to utterly destroy their enemies.
When you choose this specialization at 2nd level, you gain the Control Flames cantrip, which doesn't count against the number of mage cantrips you know.
Also at 2nd level, you learn how to enhance the volatile power of your fiery magic. Whenever you cast a spell that deals fire damage, the spell's fire damage dice increase in size by one step; d4 to d6, d6 to d8, d8 to d10, and d10 to d12. If a spell already deals its damage in d12 dice, they don't increase any further.
Beginning at 6th level, when a creature rolls a natural 1 on a saving throw made against a spell you cast that deals damage, they take double damage from the spell.
At 10th level, if you are reduced to 0 hit points, you can use your reaction to draw on the fiery energy that burns within you. You are instead reduced to 1 hit point, and each creature within 10 feet of you takes fire damage equal to half your mage level + your Intelligence modifier.
Once you use this feature, you can't use it again until you finish a long rest.
When you reach 14th level, you learn how to unleash the true destructive potential of your fire magic. When you roll fire damage for a spell and roll the highest number possible on any of the dice, roll those dice and add those rolls to the damage. You may only reroll each die once with this feature.