KRE-O Transformers Micro-Changers Combiners Decepticon Piranacon Construction Set (A4475) 4-in-1 Decepticon Piranacon construction set Build 4 Kreon figures in robot or creature mode Build Decepticon Nautilator, Overbite, Decepticon Snaptrap and Tentakil figures as robots or creatures Build 1 huge Combiner robot Works with major construction brands