Hidden Arsenal (Korean: 숨겨진 세력 Sumgyeojin Seryeok "Hidden Force") is a series of Booster Packs in the TCG and in Korean in the OCG. Packs in this series contain cards released in Japanese Duel Terminals. Each pack contains one Secret Rare and four Super Rares.
List
- Hidden Arsenal
- Hidden Arsenal 2
- Hidden Arsenal 3
- Hidden Arsenal 4: Trishula's Triumph
- Hidden Arsenal 5: Steelswarm Invasion
- Hidden Arsenal 6: Omega Xyz
- Hidden Arsenal 7: Knight of Stars
