ygo-card-build

Start by defining the card's stats and effect, then compare it against 3-5 existing cards with similar functions. Check that costs and restrictions match the effect's power, and verify the card is not strictly better than any official option.

An unconditional negate requires discarding a card, sending itself to the graveyard, and a once-per-turn clause. A conditional negate needs a specific trigger condition plus once per turn, following the skill's cost-benefit balance rules.

"If" indicates a non-chainable condition that cannot miss timing, while "when" indicates a chainable condition that can miss timing. The skill's wording standards also cover "and if you do", "also", and "then" for resolution order.

Red flags include powerful effects without once-per-turn clauses, unconditional negates without significant cost, unrestricted searches, costless mass removal, and free draws or special summons. Compare against existing staples to confirm.

Yes. After designing the card with an 8-digit password as its ID, follow the script implementation guide and save the Lua script as c<password>.lua. The design workflow explicitly hands off to script implementation.