While Bandai Namco hasnt released an official online simulator, the OPTCGSim offers a free, fan-made solution that is regularly updated and easy to use
On top of that, Emrakul never had to exist in a format with powerful graveyard hate along the lines of Rest in Peace, Leyline of the Void, or Scavenging Ooze, and the presence of those cards gives opposing decks much more ability to fight back against Emrakul
I think the signature is cool enough, but the memory and experience part of it is really what I care about, which then makes that specific signature associated with that memory great
And Sightseer will help fill out benches, taking the top four cards from the deck and letting any basic Pokemon cards found there go into play
It's an e-card that, when scanned with an e-reader, reveals bonus content like mini-games or Pokdex info