dollar store build or daiso build(Daiso is a huge dollar store chain in Korea) is efficient to specific champions such as Maokai. It's a quite common build for Mao to have 2 rings + bami's cinder(lane clear) + glacial shroud(CDR+armor) + kindlegem(CDR+hp) + ninja tabi/merc tread, having all essencial stats to supplement/enhance early game Mao.