Vidolium the Unstable Power Patron of Unity

Per-phrase breakdown

• You can activate 1 of these effects; ● Destroy this card, and if you do, Special Summon 1 "Power Patron" monster from your hand or GY. ● Destroy this card, also for the rest of this turn, "Power Patron" monsters you control whose original Level is 12 gain 5000 ATK. (Ignition-like)
• You can only use this effect of "Vidolium the Unstable Power Patron of Unity" once per turn. (Condition)
• Cannot be Normal Summoned/Set. (Summoning condition)
• Must be Special Summoned (from your Extra Deck or GY) by returning 3 monsters (1 Fusion, 1 Synchro, and 1 Xyz) from your face-up field and/or GY to the Extra Deck. (Summoning condition)
• Unaffected by monster effects, except "Power Patron" monsters. (Continuous)
• If this card is added to your Extra Deck face-up: You can add 1 "Power Patron" card from your Deck to your hand. (Trigger)
• You can only use this effect of "Vidolium the Unstable Power Patron of Unity" once per turn. (Condition)
• If this card is Special Summoned: Banish (face-down) all cards in the GYs. (Trigger)

Judge-facing facts

• This card cannot be Normal Summoned or Set.
• Special Summoning this card by returning 1 Fusion, 1 Synchro, and 1 Xyz Monster to the Extra Deck is a Summoning procedure that does not start a Chain.
• This card must be Special Summoned by its own procedure; it cannot be Special Summoned by other card effects, even if properly Special Summoned first.
• The monster effect that makes this card unaffected by monster effects (except "Power Patron" monsters) is a Continuous Effect.
• The monster effect that adds a "Power Patron" card to the hand is a Trigger Effect that activates in the Extra Deck.
• The monster effect that banishes all cards in the GYs face-down is a mandatory Trigger Effect.

Card-specific notes from database

• The Summoning procedure does not treat the returned monsters as being returned by a card effect. (Konami neuron)
• The Trigger Effect that adds a card to the hand can be activated during the Damage Step. (Konami neuron)
• The mandatory Trigger Effect that banishes all cards in the GYs activates even during the Damage Step. (Konami neuron)
• If this card is temporarily banished from the Extra Deck and returns during the End Phase, it is treated as being added to the Extra Deck face-up, allowing its Trigger Effect to be activated. (YGOResources)
• If "Starving Venemy Dragon" targets this card, it copies this card's name and becomes a "Power Patron" monster; therefore, this card is affected by its effect and will have its ATK/DEF reduced and effects negated. (YGOResources)
• "Ghost Belle & Haunted Mansion" can be chained to this card's Pendulum Effect that Special Summons from the hand or GY, even if there are no applicable monsters currently in the GY. (YGOResources)