local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_TYPE, COMBAT_PHYSICALDAMAGE)
setCombatParam(combat, COMBAT_PARAM_BLOCKARMOR, 1)
setCombatParam(combat, COMBAT_PARAM_EFFECT, 31)
setCombatParam(combat, COMBAT_PARAM_USECHARGES, 1)

function onGetPlayerMinMaxValues(cid, skill, attack, factor)
	local min = skill * attack / 17 + getPlayerLevel(cid) / 5 + 1
	local max = skill * attack / 9  + getPlayerLevel(cid) / 5 + 6
	return -min, -max
end
setCombatCallback(combat, CALLBACK_PARAM_SKILLVALUE, "onGetPlayerMinMaxValues")

function onCastSpell(cid, var)
	if getCreatureHealth(cid) > (0.3 * getCreatureMaxHealth(cid)) then
		doCombat(cid, combat, var)
		doCreatureAddHealth(cid, -(0.3 * getCreatureMaxHealth(cid)))
	else
		doPlayerSendCancel(cid, "Not enough health to perform this spell.")
	end
	return true
end

Obrigado Gantz!

rep