NCXyz

CCXyz monsters or Double Chaos Xyz (ダブルカオスエクシーズ Daburukaosuekushīzu) are extremly powerful Xyz Monsters that can only be summoned by the effect of Rank-Up-Magic Supreme Barian's Force by Ranking-Up a CXyz or Number C (in the case of Number CC). Unlike the regular CXyz Monsters, these monsters require both the original Xyz Monster along with their original CXyz counterpart to utilize their more powerful secondary effects. Sometimes, a CCXyz monster can gain negative effects if it doesn't have either the original or primary CXyz attached to it.