Tengu format ruling
Black Luster Soldier - Envoy of the Beginning

Card effect (current official text)Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) by banishing 1 LIGHT and 1 DARK monster from your GY. Once per turn, you can activate 1 of these effects.
● Target 1 monster on the field; banish it. This card cannot attack the turn this effect is activated.
● If this attacking card destroys an opponent's monster by battle: It can make a second attack in a row.
Rulings
- Black Luster Soldier - Envoy of the Beginning is treated as a different card from Black Luster Soldier. So you can have 3 copies of Black Luster Soldier - Envoy of the Beginning and 3 copies of Black Luster Soldier in your Deck & Side Deck combined.
- Black Luster Soldier - Envoy of the Beginning can remove itself from play using its first effect.
- The first effect of Black Luster Soldier - Envoy of the Beginning can be activated during your Main Phase 1 or 2. The second effect can be activated during your Damage Step in your Battle Phase, and can be chained to.
- If you activate Black Luster Soldier - Envoy of the Beginning's first effect, and Skill Drain is chained to it to negate the effect, or if Skill Drain was active before you activated the effect, you cannot attack with Black Luster Soldier - Envoy of the Beginning that turn because the activation of the effect was not negated and the condition that is included will not be negated by Skill Drain.
- If Black Luster Soldier - Envoy of the Beginning attacks, and its attack is negated by Magic Cylinder or Negate Attack, you cannot activate his first effect during Main Phase 2.
- When a card is removed from play by Black Luster Soldier - Envoy of the Beginning's first effect, it is removed from play face-up.
- If Black Luster Soldier - Envoy of the Beginning destroys your opponent's only monster with his first attack, he can attack your opponent directly for the second attack.
- If Black Luster Soldier - Envoy of the Beginning attacks and destroys your opponent's monster, then attacks a second time and destroys another monster, it does not get to attack any more that turn.
- Even if you equip him with Twin Swords of Flashing Light - Tryce, Black Luster Soldier - Envoy of the Beginning only gets a maximum of 2 attacks.
- When Black Luster Soldier - Envoy of the Beginning conducts a second attack using his second effect, his effect activates during the first attack's Damage Step, and the attack is declared in the next Battle Step. The second attack must come consecutively after the first attack; other monsters' attacks cannot come in-between.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.