Goblin Bikers on a Rampage

You can only use this Skill's second and third effects once per Duel. 1: Any effect damage your cards would inflict to your opponent becomes 0, and you can only Special Summon Xyz Monsters from your Extra Deck. 2: Reveal 1 "Goblin Biker Dugg Charger" or "Goblin Biker Grand Entrance" in your hand. Add up to 2 "Goblin Biker" monsters from your Deck to your hand. Then, you can Set 1 "Goblin Biker Grand Bash" from your Deck to your field. 3: If you control "Goblin Biker Big Gabonga" or only your opponent controls a monster, Set 1 "Goblin Biker" Trap Card from your Deck to your field. (This card can be activated the same turn.)