Box of Friends [AC18-EN002] Super Rare Fiend Set: Hidden Summoners Card type:

Set: Hidden Summoners Card type: Synchro/Effect Monster Rarity: Secret Rare Attack: 2900 Defense: 2400 1 Tuner + 1+non-Tuner monsters / You can only control 1 "Yoko

Your Graveyard is unaffected by "Necrovalley"

and if you do that

For the rest of this turn after this card resolves

Box of Friends [AC18-EN002] Super Rare Fiend Set: Hidden Summoners Card type:Set: 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.