Ray - moveable beam that would cause small explosions wherever the beam touches, the explosions would do very little damage, and can be used to “chase” players.
Ridge - 5 to 15 medium sized explosions that go in a line in front of the player. Think like pulling a string from under the sand, wherever the string breaks out, there’s a explosion. further away blasts would do less damage and/or be smaller.
??? ( maybe swarm? ) - several spheres are spawned that either track players and deal small damage, or try to intercept projectiles and stop them. can all be spawned at once or over time.