Ah I see! Let's just keep that as flavor and say you dont need to roll for it--just to keep things SWADE simple, just roll appropriate Skill for action 😁
IEYACHUS - The creature charging at you rears back in frustration at the ignition of your lightsaber. The protect its eyes, it whips its head round, inadvertently smashing into a large stalagmite!
The one with the distended mid-section lets out a honk of anger and lumbers out of the water toward you.