1 LIGHT or DARK Dragon monster + 1 Dragon monster
If this card is Fusion Summoned: You can target cards your opponent controls, up to the number of LIGHT and DARK monsters used as this card's material; destroy them. If this card is banished: You can target 1 Level 4 LIGHT or DARK Dragon monster you control; its Level becomes 8. You can only use each effect of "Khaos Starsource Dragon" once per turn.