Gandora the Dragon of Destruction [JUMP-EN028] Ultra Rare Warrior you can activate its effect

you can activate its effect

Set: Shonen Jump Magazine Promos Card type: Synchro/Effect Monster Rarity: Ultra Rare Attack: 2600 Defense: 2100 1 Tuner + 1 or more non-Tuner DARK monsters Once per turn

) You can only use this effect of "Number 75: Bamboozling Gossip Shadow" once per turn

or activate an Effect Monster's effect

you can banish 1 Thunder monster from your GY instead

Gandora the Dragon of Destruction [JUMP-EN028] Ultra Rare Warrior you can activate its effectSet: Shonen Jump Magazine Promos Card type: Effect Monster Rarity: Ultra Rare Attack: 0 Defense: 0 This card cannot be Special Summoned. You can pay half your Life Points to destroy and remove from play all other cards on the field. For every card that is removed by this effect, this card gains 300 ATK. This card is sent to the Graveyard at the End Phase of the turn it was Summoned.