Forum:Stardust Dragon VS Royal Oppression

Player A has Royal Oppression active and enough life to activate. Player B had used Stardust Dragon's first effect successfully previously in the turn and it's now in the Graveyard.

At the End Phase of that turn...

Player B Special Summons Stardust Dragon. Player A activates Royal Oppression, pays 800 life, to negate the summon and destroy Stardust Dragon.

Question 1: At this point, can Stardust Dragon Tribute itself to negate/destroy Royal Oppression? Question 2: If Stardust Dragon cannot negate and he's destroyed, can he Special Summon himself again during the same End Phase?