Cone of Thunder

As a Bonus Action, the wielder can slam the axe head against the ground, causing a 60’ cone of thunder to blast out from the impact. Constitution Save DC 15 or take 3d8 thunder damage and be knocked prone (half damage on a success and not knocked prone). After using this ability, for the next two rounds, any creature that starts or ends its turn within 10’ of the wielder takes 1d6 lightning.