Tsunami

Tsunami is Richard's power. If he's in water, it generates a tsunami when he slashes his trident through the water. If he's on land, it generates water that creates a tsunami but the water disappears as it touches the ground. In the water, the brute force of the tsunami usually can overpower anything or anyone, as it sweeps them away and pushes them underwater. On land, it is slightly less powerful, only used as a brief distraction, sweeping the enemy away to regroup.

Q&A
Q= How does he survive the tsunami himself?

A= The tsunami appears in front of him, so he doesn't get hit by it.