mtg march of the machines most valuable cards GAMING: five expensive from the Machine- Aftermath Top 11 Most Expensive Cards

Unfortunately for the gang, she's 59 floors up from where they are

The Council of Four Cards that profit from your opponents taking game actions scale very well in Commander

It has "Sacrifice this creature: Add to your mana pool." , Sacrifice From Beyond: Search your library for an Eldrazi card, reveal it, put it into your hand, then shuffle your library

But now that we've made Vedalken Orrery, someone will (and I don't mean one poor guy slaving away in his basement with all 6000+ cards)

First of all, he gains lore whenever he banishes an opponent's character in a challenge

Bill leverages fast mana and +1/+1 synergy to create a big threat early, then protects it with vines and tricks