The card that the subgame winner puts onto the main-game battlefield doesn't have to come from the subgame battlefield
Room for improvement The dataset used for training were official card art images used from ygoprodeck (dataset A) and not real life photos of cards in the wild / pictures of cards taken by a camera (dataset B)
Heartless Hidetsugu deals damage to each player equal to half that players life total, yourself included
Its one of the most important cards in that format, and every serious Modern player needs a set of these
Pokmon's own Scarlet and Violet rarity update spells these out: "double rare cards are represented with two solid black stars," and "hyper rare cards will be represented with three shiny gold stars," while the older "solid black symbols for common, uncommon, and rare, circle, diamond, and star, will remain unchanged" (Pokemon.com)