Concussive Blow

When you use this technique, you focus your firebending on your focusing sigil launching a beam of energy. You launch the concentrated beam of energy and periodically cause explosions on the way. For every 20ft that the beam travels you roll a Strength Check. On a success, you continue your beam but on a fail, the beam explodes at that distance and takes effect. Wherever the beam ends, any affected creature must make an Elemental Affinity Saving Throw. On a fail, creatures within 10ft of the explosion are stunned and deafened until the start of their next turn. At Mastered level, you have advantage on the Strength Checks.