Forum:Diamond dude and pot of avarice q?

here is my situation !!!


 * player1 have diamond dude and he activate it's effect and send pot of avarice in the graveyard but he don't have any monster in the graveyard.


 * now player2 summoned raiuo and attacked diamond dude. then end turn.


 * now my question is can player1 still activate the pot of avarice even if diamond dude is destroyed?


 * and can player1 activate pot of avarice even if there are no monster in his graveyard?