[RMXP] Attack that hits enemies and allies

Wasn't quite sure what to call the topic >.<
This is going to sound like a very odd request but here it is anyway...

I want to create a tidal wave attack which deals water damage to enemies but also can sometimes cause instant death (sort like the effect of being washed away) and also damages the player's party for a small amount of damage (because in realistically the tidal wave would hit everyone).
The attack (if it is possible) is going to be used as like a limit break/overdrive type thing but I didn't want the attack to be too good (hence the also damaging own party element)

Does anyone know if it is possible?

Possible it is, but unfortunately I can't help you more then that. You can make it in CBS for sure, idk about DBS.