Black Luster Soldier - Envoy of the Evening Twilight

When Special Summoning "Black Luster Soldier - Envoy of the Evening Twilight", if the number of LIGHT and DARK monsters in your Graveyard is equal, you must banish all LIGHT monsters or all DARK monsters in your Graveyard as the procedure for the Special Summon. The banishing of the monsters and the Special Summon are not treated as occurring simultaneously.

Even if this card was Special Summoned by the method written in its text and subsequently sent to the Graveyard, it cannot be Special Summoned by the effects of other cards, such as "Monster Reborn".

The effect "This card is also treated as LIGHT-Attribute" is a Continuous Effect.

The effect "When this card is Special Summoned: You can activate one of these effects, based on the Attribute of the monsters banished for the Special Summon. You cannot conduct your Battle Phase the turn you activate this effect. ● LIGHT: Target 1 monster on the field; banish it. ● DARK: Randomly banish 1 card from your opponent's hand face-down until their End Phase" is a Trigger Effect. (The effect "● LIGHT:" targets 1 monster. The effect "● DARK:" does not target.)