Header

    globals
    
        BuffType drol_spellDmgRecieved
    
    endglobals
    
    //Do not remove or rename this function!
    //Put your initialization tasks here, this function will be called on map init
    private function init takes nothing returns nothing
    
        local Modifier m = Modifier.create()  
        call m.addModification(MOD_SPELL_DAMAGE_RECEIVED,0.15,0)  
         
        set drol_spellDmgRecieved = BuffType.create(5,0,false)
        call drol_spellDmgRecieved.setBuffIcon('@@0@@')
        
        call drol_spellDmgRecieved.setBuffModifier(m) 
    
    endfunction

On Attack

function onAttack takes Item itm returns nothing
    local Tower tower = itm.getCarrier()

    if tower.calcChance(0.10 * tower.getBaseAttackspeed()) then
        call drol_spellDmgRecieved.apply(tower, Event.getTarget(),tower.getLevel())
    endif
endfunction