forgottenserver/data/scripts/spells/attack/mud_attack.lua

local combat = Combat()
combat:setParameter(COMBAT_PARAM_TYPE, COMBAT_EARTHDAMAGE)
combat:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_CARNIPHILA)
combat:setParameter(COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_SMALLEARTH)

function onGetFormulaValues(player, level, magicLevel)
	level = math.min(level, 20)
	magicLevel = math.min(magicLevel, 20)
	local min = (level / 5) + (magicLevel * 0.4) + 2
	local max = (level / 5) + (magicLevel * 0.8) + 5
	return -min, -max
end

combat:setCallback(CALLBACK_PARAM_LEVELMAGICVALUE, "onGetFormulaValues")

local spell = Spell(SPELL_INSTANT)

function spell.onCastSpell(creature, variant)
	return combat:execute(creature, variant)
end

spell:group("attack")
spell:id(172)
spell:name("Mud Attack")
spell:words("exori infir tera")
spell:level(1)
spell:mana(6)
spell:isPremium(true)
spell:range(3)
spell:needCasterTargetOrDirection(true)
spell:blockWalls(true)
spell:cooldown(2000)
spell:groupCooldown(2000)
spell:vocation("druid;true", "elder druid;true")
spell:register()