local condition = Condition(CONDITION_DROWN)
condition:setParameter(CONDITION_PARAM_DELAYED, 1)
condition:addDamage(50, 5000, -20)

local combat = Combat()
combat:setParameter(COMBAT_PARAM_TYPE, COMBAT_DROWNDAMAGE)
combat:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_BUBBLES)
combat:setArea(createCombatArea(AREA_CROSS6X6))
combat:setCondition(condition)

function onCastSpell(creature, var)
	return combat:execute(creature, var)
end
