Lilianas plus ability forces each player to discard a card, this ensures that both players will be top decking while your Planeswalker is on the battlefield generating loyalty
0/4 means you aren't going to remove it very easily very early with damage alone, meaning that it can just sit around and fade some damage while getting the effect off
Mothra, or Luminous Broodmoth, doesnt see much play outside of Dual Commander for competitive-ish formats, so most of this price increase is likely a result of Commander and potentially even collectors
Finality is a quality sweeper when needed, which is a luxury
Viscera Seer + Carrion Feeder Access to free sacrifice outlets makes any aristocrat deck stronger
Cherry Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Not Legal Comp