Vigilance creatures get around it, which can feel bad, but at the 2-mana slot, a fog is a fog
One key part of Urzas Saga is other artifacts to let you unlock the parts where it two-shots your opponent and bowls over all their creatures when you have more artifacts
While Card Conduit focuses solely on Magic cards and wont handle other games or accessories, they will exclude valueless bulk and may offer to return or donate it
Those abilities won't trigger if you choose to sacrifice zero permanents
Something like Felisa, Fang of Silverquill or Ghave, Guru of Spores
Runner-up would probably be Return of the Wildspeaker, which is a weaker Rishkars Expertise (since it lacks the free 5-drop) but makes up for it as a sudden +3/+3 to all your non-human creatures