2+ Level 8 monsters
Once per turn, during your Standby Phase: You can attach 1 card from your opponent’s GY to this card as material. You can only use each of the following effects of «Number 1: Infection Buzzking» once per turn. If this card is Xyz Summoned: You can look at your opponent’s Extra Deck and send 1 card from it to the GY. You can detach 1 material from this card, then target 1 card your opponent controls; destroy it, then if you destroyed a face-up monster, inflict damage to your opponent equal to half the ATK it had on the field.

2 Level 4 monsters
When a monster declares an attack: You can detach 1 material from this card; negate the attack. If this card is targeted for an attack, while it has no material: Destroy this card.

3 Xyz Monsters with the same Rank, except «Number» monsters
(This card’s original Rank is always treated as 1. This card is always treated as a «Utopic Future» card.)
You can also Xyz Summon this card by using «Number F0: Utopic Future» you control as material. (Transfer its materials to this card.) Cannot be destroyed by battle or card effects. Once per turn, when your opponent activates a monster effect (Quick Effect): You can detach 1 material from this card; negate the activation, then, if that monster is on the field, gain control of it.

If this card is in your GY: You can Tribute 3 monsters; Special Summon this card. Once, while this card is face-up on the field (Quick Effect): You can send all monsters from the field to the GY, except face-up monsters Special Summoned from the GY. You can only use each effect of «Ogdoabyss, the Ogdoadic Overlord» once per turn.