Goblin Bikers Gone Bonkers (Ultra Rare)

2+ Level 6 monsters
You can target face-up monsters your opponent controls, up to the number of Goblin monsters you control; detach 1 material from a monster you control, and if you do, attach those monsters to this card as material. During your opponent's turn (Quick Effect): You can target cards your opponent controls, up to the number of Goblin Xyz Monsters you control; detach 3 materials from a monster(s) you control, and if you do, send those targeted cards to the GY. You can only use each effect of Goblin Bikers Gone Bonkers once per turn.