Xのかたまり (embodiment of X)

A productive metaphorical pattern using かたまり ('lump, mass') with の to portray someone or something as the embodiment of a quality: 善意のかたまり (all goodwill), 才能のかたまり (talent personified), 矛盾のかたまり (a bundle of contradictions). The whole entity is reduced to a single defining property.