Box of Friends [AC18-EN002] Super Rare Fiend you cannot Special Summon monsters

you cannot Special Summon monsters

and if you do that

that target gains 400 ATK

Once per turn: You can remove all Black Feather Counters on this card

Gains 100 ATK for each "Neo-Spacian" and "HERO" monster in your GY

Box of Friends [AC18-EN002] Super Rare Fiend you cannot Special Summon monstersSet: Advent Calendar 2018 Card type: Effect Monster Rarity: Super Rare Attack: 0 Defense: 0 If this card is destroyed and sent to the GY: You can Special Summon from your Deck, 2 Normal Monsters with different names whose ATK or DEF is 0, in face up Defense Position, but they cannot be used as Synchro Material, also they are destroyed during your next End Phase. You can only use this effect of "Box of Friends" once per turn.