Subterror Behemoth Dragossuary [RATE-EN083] Super Rare BT5-016 if [Gankoomon] is in this

if [Gankoomon] is in this Digimon's digivolution cards or you have a Digimon with [Sistermon] in its name in play

You can only use this effect of "Mekk-Knight Morning Star" once per turn

You must have no cards in your hand to activate and to resolve this effect

and giant robots

Subterror Behemoth Dragossuary [RATE-EN083] Super Rare BT5-016 if [Gankoomon] is in thisSet: Raging Tempest Card type: Flip Effect Monster Rarity: Super Rare Attack: 2400 Defense: 1600 FLIP: You can activate this effect; this turn, "Subterror" cards you control cannot be destroyed by your opponent's card effects. You can only use this effect of "Subterror Behemoth Dragossuary" once per turn. When a face up monster you control is flipped face down, if you control no face up monsters: You can Special Summon this card from your hand in