This is because Zvi Mowshowitz (who has broken more engine cards than any other player in Magic history) built a deck around the Bargain that was so degenerate it was preemptively banned in Extended
These are vital in keeping Phenax around and allow you to build around it much easier without having to worry about it dying as much as other "build-around" commanders might need you to
The creature you return must be tapped at the time you pay costs, but doesn't necessarily need to be tapped before you start casting the spell
If you sell to a local game store, be prepared to accept a lower price
You should have a legendary dork in play and you should wipe out most of their defenses with it enabling you to easily attack opposing walkers to death
Hopeless Nightmare - Why it Was Banned in MTG's Standard Format Perhaps not as problematic as other cards on this list, Hopeless Nightmare is still very frustrating to play against due to strategies that bounce it back to the owner's hand from play or the graveyard, making it a consistently strong 1-drop for Orzhov Pixie decks in Standard