This card cannot be Special Summoned except with "Mask Change", "Mask Change II" or "Form Change". Even if this card was Special Summoned once, it cannot be Special Summoned from the Graveyard by "Monster Reborn".[1]
After the effect of "Cardcar D" resolves, since they added cards from their Deck to their hand, you can activate the "Once per turn, if your opponent adds a card(s) from their Deck to their hand, except during the Draw Phase: You can banish 1 random card from your opponent's hand." effect. Similarly, when the opponent adds a Warrior-Type monster to their hand with "Reinforcement of the Army", you can also activate this effect.[2]
The "Once per turn, if your opponent adds a card(s) from their Deck to their hand (except during the Draw Phase or the Damage Step): You can banish 1 random card from your opponent's hand." effect can only be activated after resolving an effect in which the opponent added a card(s) from their Deck to their hand, except during the Draw Phase. It cannot be activated later during the same turn.[3]
If this card is destroyed by a card effect, the "Any card sent to your opponent's Graveyard is banished instead." effect stops applying. Therefore, If "Masked HERO Dark Law" attacks a face-down "Man-Eater Bug", and it is destroyed by the effect of that monster, that "Man-Eater Bug" is sent to the Graveyard as usual.[4]
If this card is destroyed by battle, the "Any card sent to your opponent's Graveyard is banished instead." effect stops applying. Therefore, If "Masked HERO Dark Law" battles with a monster with the same ATK, and both monsters are destroyed, the opponent's monster is sent to the Graveyard as usual.[5]
↑Konami OCG Card Database: If the opponent adds a card(s) from their Deck to their hand using either "Cardcar D" or "Reinforcement of the Army", can you activate the effect of "Masked HERO Dark Law"?
↑Konami OCG Card Database: If the opponent has added a card(s) from their Deck to their hand this turn, when can the effect of "Masked HERO Dark Law" be activated?
↑Konami OCG Card Database: If "Masked HERO Dark Law" attacks a face-down "Man-Eater Bug", and it is destroyed by the effect of that monster, is "Man-Eater Bug" banished?
↑Konami OCG Card Database: If "Masked HERO Dark Law" battles with a monster with the same ATK, and both monsters are destroyed, is the opponent's monster banished?
↑Konami OCG Card Database: If your opponent controls "Masked HERO Dark Law", can "Super Polymerization" be activated?
↑Konami OCG Card Database: If "Masked HERO Dark Law" destroys "Nekroz of Unicore" by battle, what happens with each effect?