In the second above-mentioned episode, this card appears in a flashback Ishizu has when she notes to herself what happened when Kaiba used "Cross Sacrifice" to tribute her monsters and summon "Obelisk the Tormentor".
In the second above-mentioned episode, this card appears in Ishizu's thoughts when she notes just like the future she saw, Kaiba will attack with "Obelisk the Tormentor" and that will activate her Trap Card's effect, which will destroy "Obelisk" and win Ishizu the Duel.
"Blast Held by a Tribute" was called Sacrifice's Blast. The damage inflicted by the card was never specified. The card artwork was a little different than the OCG version. Also, it seems to have a different activation condition as Kaiba used the Tribute Summoned "Blue-Eyes White Dragon" to attack Ishizu directly and yet this card couldn't activate.