Header

    globals
        BuffType sir_sleeve_buff
    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_ATTACKSPEED,0,0.005)
        call m.addModification(MOD_SPELL_DAMAGE_DEALT,0,0.0025)
        call m.addModification(MOD_DAMAGE_ADD_PERC,0,0.01)
        set sir_sleeve_buff = BuffType.create(0,0,true)
        call sir_sleeve_buff.setBuffIcon('@@0@@')
        call sir_sleeve_buff.setBuffModifier(m)
        call sir_sleeve_buff.setStackingGroup("sir_sleeve_group")
    endfunction

On Attack

function onAttack takes Item itm returns nothing
    local Tower tower = itm.getCarrier()
    local Buff b = tower.getBuffOfGroup("sir_sleeve_group")
    local integer level = b.getLevel()
    if level < 120 then
        call sir_sleeve_buff.applyAdvanced(tower,tower,1+level,level,1.5)
    else
        call b.refreshDuration()
    endif
endfunction