The HQ for the combining heroes of justice discovered!
RD/KP07-JP042 超魔基地マグナム・オーバーベース Chouma Kichi Magnus Overbase (Super Magibase Magnum Overbase)
Field Spell Card
[Requirement] If your LP is less than your opponent’s, you can activate this card.
[Effect] While this card is face-up in a Field Zone, face-up monsters (Level 7 or higher/Machine-Type) on the field gain 400 ATK, also face-up monsters (Level 10/Machine-Type) on the field cannot be destroyed by the effects of Spell/Trap Cards.