That token has to be represented by food (again, this card is talking about actual food, not Food tokens which were still 3 years away from making their debut) and you have to eat it any time one of those tokens dies
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The life loss adds up, but so does casting every spell in your hand exactly when you want to
Several examples of typical black cards include Fukurou from Pillars of Strength [OP-03] which cant be KOd by effects, Kuzan from Paramount War [OP-02] which enables the player to draw a card when played before reducing the cost of an opponents Character by 4 during that turn, and Hina from the same set which when on block, allows the player to select any of the opponents Characters with a cost of 6 or less and prevent that opposing Character from attacking during that turn
I havent tried in probably 6 months though
Admittedly, that's a lot, and battles are brand new