It is a 0-cost so it may draw out your opponents Gold, it is a 5/5 which is hard to kill without spending Gold, and it hits pretty hard
If Betrayer's Bargain resolves, its effect causes the creature to be exiled any time it would die that turn, not just if it would die as a result of damage dealt by Betrayer's Bargain
They could also be decks with heavy restrictions, or even ones built around rule zero
If you opt to print proxy cards through a 3rd party company, you can get a high quality result
Blue mages rejoiced, and white mages wept, and blue-white mages had quite the identity conflict
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