Ninja Gaiden

You unleash a powerful wave of internal chakra from your tenketsu points, creating an explosive burst of energy that ripples through the area. All creatures within a 10-foot radius take 4d6 force damage, with a Strength saving throw allowing them to halve the damage. Flying creatures or those leaping in the air are knocked prone, while you can choose one creature to automatically succeed on their saving throw, sparing them from harm.