Mastery of Fire

With experience and training, you have become well-versed in the ways of manipulating elemental fire. This practice has given you immense mastery over flame and expands the abilities of your fire, granting you the following benefits: 

• You can control your internal body temperature using your breath allowing you to tolerate the most extreme temperatures without suffering from them.
• You learn the create bonfire cantrip, if you don't know it already. It now works in a 10 ft cube, and you may create and concentrate on 2 bonfires when you cast it. 
• You also learn the control flame cantrip, if you don’t know it already. It now works in a 15ft cube, and you may create complex, detailed, specific shapes — such as the face of a specific creature — within the flame and animate it as you choose. You may also cast it as a reaction on magical or non-magical flames. If the flame is magical, make an ability check using the ability score chosen when you picked this feat. The DC equals 10 + the spell’s level. On a successful check, you may manipulate the flame using the spell. On a failed check nothing happens, and you cannot attempt to control the flame again until you rest.
• When you deal fire damage you may ignite the target till the end of their next turn. At the start of an ignited creature’s turn, it takes 1d4 fire damage. This damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).