Edison Format · March 2010
Cards that are Tributed or Discarded are included, because they are also 'sent to the GY'.
The effects of multiple "Skull Invitation" are cumulative.
If "Dark Hole" destroys monsters controlled by both players, the damage from "Skull Invitation" is applied to both players simultaneously.
If you draw the final piece of "Exodia the Forbidden One" with "Graceful Charity" and have all 5 pieces of "Exodia the Forbidden One" in your hand after discarding, you win the Duel even if the damage resulting from "Skull Invitation" would reduce your Life Points to 0.