Bug playing Magic compass?

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In my last match, my opponent uses Magic Compass and play Regis: Bloodust. He had 2 cards left on the deck when he used Magic compass. How is that even possible when Regis: Bloodust is a neutral card. Not facction.

What am i missing here?
 
Cards like Compass determine faction by leader ability. Opponent played Renfri, so their faction became neutral and that's why it showed neutral cards to choose from.
 
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