Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand or GY) by banishing 3 monsters with different Types from your GY. If this card is Special Summoned: You can banish up to 2 cards on the field. (Quick Effect): You can target 1 monster your opponent controls; negate its effects, and if you do, this card gains ATK equal to that monster’s original ATK until the end of this turn. You can only use each effect of "Sovereign of the Event Horizon" once per turn.