Astuces du Wikia
This card can be used to Synchro Summon easier, even more so for Synchro Monsters with awkward summoning restrictions, such as Turbo Warrior, Road Warrior or Majestic Star Dragon.
This card is useful to counter stalling cards like Gravity Bind and Level Limit - Area B.
You can decrease a Level 4 or 3 monster's level by 2 for "Junk Warrior's" effect. This works well with monsters like Goblin Attack Force or any other monster with high ATK.
You can use this card with high level monsters and by downgrading them to level 1, you can equip Opti-Camouflage Armor and attack your opponent directly. This can work even better with high level Water-monsters in conjuction with A Legendary Ocean.
Use this card to downgrade the level of Fusion Monsters or Ritual Monsters so they can be equipped with Fusion Weapon or Ritual Weapon.
Combine this card with Zombie World and The Lady in Wight to make your high level monsters unable to be destroyed by Spells, Traps or by battle.
* This can also be conducted with Demotion.