bomber

 you have learned to make bombs from scratch:

• spending 1 minute and 25 GP for materials you can create up to a number of sticks of dynamite equal to your intelligence modifier.
• you have resistance to fire damage.
• you gain proficiency with all explosives. 
• you and your allies have advantage attack rolls on creatures that were blown up by one of your bombs, also creatures are surprised if blown up by one of your bombs.