Cards that are “Forbidden” cannot be used in your Main Deck, Extra Deck, or Side Deck. You can only have 1 copy maximum of a “Limited” card in your Main Deck, Extra Deck, and Side Deck combined. You can only have 2 copies maximum of a “Semi-limited” card in your Main Deck...
The changes to the forbidden and limited list in Duel Links aim to foster more deck types in PVP. It’s important to note that the Forbidden/Limited list in Yu-Gi-Oh! Duel Links functions differently than compared to the TCG. In the traditional Yu-Gi-Oh! card game, cards that hit...