The biggest downside of the deck is its mana requirements
Phyrexian Arena is one of those, and youll play it whenever your game plan is to get ahead on resources, like to get an edge in midrange mirrors or to beat control decks
If you haven't scheduled the full complement of Core Set 2020 events, now's the time
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In Magic terms, they gain the menace keyword and get additional power equal to the amount of Food tokens sacrificed
Combining this with something like Birgi, God of Storytelling can keep your mana topped up to keep the party going