Parnesse, the Subtle Brush lives up to her "subtle" title as most folks skip past her without even understanding what you're supposed to do with her: basically, Parnesse is "Grixis Politics" or "Grixis Group Hug," utilizing the copy ability of our casualty spells and other copy effects to assist other people at the table
12 mana for a card is reaching the point of absurdity, as the Eldrazi are known to do
This can be a huge shift in advantages when you get a 4/3 dragon and a bomb card from an opponent you can cast for free
You cant factor in activated abilities here either, which makes things more difficult
This flipwalkers ability to loot cards and transform into Jace, Telepath Unbound allows you to control the board with powerful spells that you can reuse from the graveyard while keeping your opponent's best attacker at bay
Ultimately, though, I dont think people are going to want to target this with any of their spellsthe upside isnt big enough compared to other things out thereand it will stay at $1