Violent Earthquake Fist
The Resshinken actually enshrouds the fist with ki allowing the user to smash everything it comes into contact with. Resshinken requires a substancial amount of control, if the person is unfocused, they may destroy objects unintentionally or significantly injure themselves and others.  When used against an opponent to effect, because of the ki enshrouded fist the technique can send the person flying several meters with incredible force.
Despite being a natural offensive attack, Resshinken does have other capabilities too. It can be used as a sort of deflective barrier, sending an attacker flying back, or simply breaking apart the actual earth. Immediately the ground begins exploding as if they had used the normal Bakusai Tenketsu, but the blast expands outwards in a cone towards opponent, the explosions and the rocks blast free, growing larger as the cone widens.