Sigardas Aid and Dryad of the Ilysian Grove are often important to deal with as well
Remember that golden rule: Prototype is irrelevant if you arent casting the card and it's not on the battlefield
I would dust off my Castle Embereths and Rimrock Knights before sleeving Atris, Oracle of Half-Truths
Even if you can't necessarily put the land straight onto the battlefield, you can alternatively use creatures such as Sylvan Ranger, Borderland Ranger, or Civic Wayfinder to get whatever land you need into your hand with ease
17 - Hot Dog Cart Another card from Spider-Man, Hot Dog Cart is a mana rock that also creates a Food Token
All three Izzet (red/blue) versions of Niv-Mizzet are in the 99, and two of them go infinite with Niv-Mizzet, Visionary