Goblin Bikers Gone Bonkers

“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.”