Sure that would work. If you can draw those in the 99 card deck.... I could have replaced Liliana Vess with Rune-Scarred Demon but it is very vulnerable to instant speed creature removal. That's why I went with Liliana instead. I'm going to look at your suggestions and some other possible ways to speed this up one turn. Thanks for the feedback!

You could just run Cultivator Colossus as the only creature and dispense with the tutors.

I didn't know about that creature. I will consider this. Thanks for the suggestion!

After doing some testing, it seems to be faster to include tutors for Ad Nauseam instead of using Cultivator Colossus or cards like Ponder, Preordain, etc with Liliana. With free mana rocks and tutors, I can cast Ad Nauseam sooner than waiting for The Prismatic Bridge's ability to resolve on turn 6. Having The Prismatic Bridge find Liliana and then find Ad Nauseam is the slowest way for this deck to win but it's reliable. I think I will leave this deck as is. Enjoy!