Yes. Lord of D. only protects Dragons from effects that target. Lightning Vortex does not target.
Stardust Dragon has a triggered effect that special summons it from the graveyard on the turn that it negated an opponent's effect. Forbidden Graveyard will negate this trigger, Stardust Dragon will not be summoned.
no, if you read it, it says that only you can.
Yes, it remains on the field and can attack as long as your opponent does not activate another effect.
Yes. Absolute Zero destroys cards on the opponent's side of the field, so would be trying to destroy, at the very least, the Stardust Dragon in question. It can therefore be tributed to negate the effect, but won't apply a destruction effect to Absolute Zero since he is already in the graveyard.
Yes, you can do that. Judgment Dragon activates its effect at Chain Link 1. Enemy Controller would be chained to this at Chain Link 2. Resolving backwards, you will take control of Judgment Dragon, then all other cards apart from Judgment Dragon will be destroyed.
Is is the Owner of Masked Dragon who gets its effect, as it is the Owner's graveyard it goes to, even if was controlled by the opponent at the time. If your Masked Dragon is taken by the opponent, and then destroyed by battle, it is you who will get the effect.
If an opponent activates a card effect from their hand, "Majestic Star Dragon" can negate and destroy it. For example, if your opponent activates the effect of "Honest" from their hand to boost their monster's ATK, you can chain to the effect with "Majestic Star Dragon" to negate and destroy "Honest" and its effect.
Stardust Dragon has a triggered effect that special summons it from the graveyard on the turn that it negated an opponent's effect. Forbidden Graveyard will negate this trigger, Stardust Dragon will not be summoned.
Yes because it's effect says you can summon a normal dragon type monster from either players graveyard. So since tribute to the doom destroys the monster is effect activates.
no, if you read it, it says that only you can.
Yes, it remains on the field and can attack as long as your opponent does not activate another effect.
No, only the player who activated Flute of Summoning Dragon can special summon the dragons through its effect.
you have to wait until you,r opponent activates a counter trap on any turn
Yes. Absolute Zero destroys cards on the opponent's side of the field, so would be trying to destroy, at the very least, the Stardust Dragon in question. It can therefore be tributed to negate the effect, but won't apply a destruction effect to Absolute Zero since he is already in the graveyard.
Yes, you can do that. Judgment Dragon activates its effect at Chain Link 1. Enemy Controller would be chained to this at Chain Link 2. Resolving backwards, you will take control of Judgment Dragon, then all other cards apart from Judgment Dragon will be destroyed.
No. Grapha, Dragon Lord of Dark World's inherent special summon can only be used on your own turn. Only monsters who summon themselves by a Triggered Effect, or by Quick Effect, or specifically say they can be summoned on the opponent's turn, can do otherwise.
Your opponent's next attack is the next time that player declares an attack in the battle phase. Basically the first attack the opponent declares will automatically be negated.