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Gura cards. Two proxies of real cards, four tokens made by real cards.
Per the rules of Magic, you can use the tokens in actual games. Tokens don't go into hidden info areas like decks or hands*, so you're allowed to use whatever. Gura can fly because the only card that makes Shark tokens is a Sharknado reference.
The proxies you could only use in casual games, not sanctioned tournaments. It'd be easy to use Tatyova Gura as your Commander in Commander games, since Commanders don't get put into decks or hands unless under rare circumstances. Keep the real card nearby just in case. As for the Greatshark... I guess just swap out the Gura printout for the real card once the real card hits the table.
*Don't ackshually me, I'm simplifying.