If you control no monsters, or all monsters you control are "Goblin" monsters, you can Normal Summon this card without Tributing. You can only use each of the following effects of "Goblin Bikers Gone Wild" once per turn. If this card is Normal or Special Summoned: You can Special Summon 1 Level 4 or lower "Goblin" monster from your Deck. If this card is sent to the GY: You can target 1 card on the field; attach it to 1 "Goblin" Xyz Monster you control.