Professional Sports Authenticator, the gold standard for ensuring trading cards are legitimate, has one representative in Canada: Brad Hartley, who lives in Halifax
Removing a shield counter when a permanent would be dealt damage or destroyed isn't the same as regenerating a creature
(2023-11-10) Permanents phase back in during their controller's untap step, immediately before that player untaps their permanents
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I think it was a fine card for formats like Standard and Modern, because it didn't absolutely dominate either of those formats